Since 1990 C&C has always been 'The Well Tempered Climate Accord'
i.e. uniting to do enough soon enough to achieve UNFCCC-Compliance

Contraction and Convergence (C&C) at COP-2 in 1996
'The Well Tempered Climate Accord' (WTCA)

It's all about the numeraire - the unit of measurement per unit time is fundamental
Support for C&C has been considerable.

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Update 2021 - Acceleration of temperature rise and damages arising & what to do about it

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A servant's heart . . . .

The whole idea of contraction and convergence came from a violinist.
It's a superb example of how the arts has put a great idea on the international stage.'

John Vidal
The Guardian

"I do think the description of C&C as a 'well tempered' carbon budget approach, is brilliantly insightful."

Of all the comments made (mostly, but not always favourably) over the now 30 years about the C&C campaign, to a musician this remark is really one of the most rewarding. It was made recently by a long term ally, friend and climate-expert who stands out for actually deserving that description.

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GCI was created in 1991. C&C was created by GCI and tabled at COP-2 in 1996 to this purpose: -
to integrate the full-term international process of UNFCCC-Compliance.

This requires the arrest of atmospheric GHG accumulation curving upwards so it gradually curves downwards to a level pre-judged as 'safe & stable' (e.g. at least 350 ppmv).

This means first setting out the whole emissions-contraction-event (the path-integral) consistent with that. So the methodology of any contraction-&-convergence-based-path-integral of future global GHG emissions deliberately embodies the sequencing structure of a UNFCCC-Compliant C&C proposition where the: -

• international emissions parts always commute with the global total path-integral, so convergence is always a function of the 'contraction-event' (and not vice-versa)
• with the given weight contracting down to zero by a given date whatever the UNFCCC-Compliant rates, weights & dates agreed by the users
  
  Structurally sequencing this way requires a fixed universal (everyone) joint/several reference standard and this is used specifically: -
  
  
• to avoid the reverse, where trying to make the contraction-event a function of myriads of contestable convergence assumptions results in randomness,
• which countervails the coherent goal-focused process needed for compliance in a structure defined by the deliberate commutation of the whole with the sum of its parts.
  
  Comment: - continuing to do too little too late with emissions control simply deepens the non-compliance that results from non-commutation, as precaution & prevention continue to be subordinated to structureless 'growth differentials' in the arbitrage economics of beggar-thy-neighbour. Eventually, due to non-compliance as the velocity/volume of climate damages exceeds those of this 'economic growth', the anthropocenic system as a whole collapses.

Logical Assumption (beyond belief)

• Equal Temperament or 'Well Tempered Tuning', comes from resolving the 'Pythagorean Comma'.
• In essence it means tuning the 12 semi-tones equally within the fundamental doubling structure of the musical 'octave'.
• Vincenzo Galileo (Galileo's father a luthier) was an early advovcate of equal temperament. It was formally established around 1721 with the classic J S Bach's 'Well Tempered Clavichord'.
• 'Well Tempering' assumes 12 equal semi-tone steps within the Perfect Octave (a doubling).
• It is the definitive expression of equal temperament.
  
  The key points arising from this are: -
  
  
• equal temperament enables music to be written in, tuned in, played in and to modulate between, all 12 musical keys within the Octave (doubling).
• this 'well tempering' simply means that all combinations in all keys always commute as equally 'in-tune' and 'in-time' within the Octave (doubling).
  
  Where and for these same reasons C&C (1994) or the 'Well Tempered Climate Accord': -
  
  
• assumes equal per capita or 'Well Tempered' emissions rights globally, with a base-year for future population sizes, as this . . .
• enables any rates/weights/dates of a C&C carbon budget to be calculated and shared, so the total always commutes with its 'well tempered' parts and . . .
• the process of carbon-contraction as a whole can be precisely aimed from the outset at a UNFCCC-Compliant outcome for atmospheric GHG concentration.
  

GCI intentionally nick-named C&C, 'The Well Tempered Climate Accord' to underline the non-ideological properties of this methodology.

The Carbon Budget Accounting Tool (CBAT)

The CBAT animation enclosing C&C was created to change the mind-set from 'evolution' to goal-focused 'evolition' with respect to pursuing UNFCCC-Compliance.

CBAT has 1,000,000 possible rates of C&C that always commute
as convergence is always subordinate to the full-term contraction-event.

The C&C 'event', like an 'Amen' cadence in music, embodies the
functionality of a goal-focused structure.

Combining C&C with Rajan's Global Carbon Incentive, it closely resembles the original C&C proposal, it has been described by Mark Carney as the First Best Option.

Logical Propositions & Ideological Assumptions where Left/right 'beliefs'
are always contested & conflicted

For 30 years, 'ideological assumptions' have obscured the sine-qua-non for UNFCCC-Compliance,
a non-random internationally inclusive path-integral for a limited & declining future weight of emissions internationally shared on a precautionary & preventive basis i.e. completing a full-term 'C&C-event' as quickly as possible.

In 2008 Professor Ross Garnaut advanced a significant but residually ideological statement about C&C saying, "(it) has the virtue of simplicity. Equal per capita emissions is a natural focal point. Contestable computations based on economic variables do not need to enter the allocation formula."

Recognizing economic variables as 'contestable' was certainly an improvement on the earlier 'ideological charge' laid by John Ashton of the UK Foreign and Commonwealth Office (FCO) who stated in 2002 that, "C&C is compelling, yet at its heart lurks a contestable ideological assumption; equal per capita emissions as rights".

When the logic is understood, there is nothing 'ideologically contestable' about 'C&C' at all. It is ideology per se that is 'contestable' as it is 'motivated'. The 'logic' is 'mechanical'. Particles & waves cohere and/or decohere as feedback integrated between ratios-rates and rational-irrational numbers.

Earlier still in 1998, British sociologist Professor Anthony Giddens claimed that the radical center is synonymous with the Third Way. For Giddens, an advisor to former British Prime Minister Tony Blair, and for many other European political actors, the Third Way is a reconstituted form of the ideological amalgam know as 'social democracy'.

Probably for these reasons, Anthony Giddens was consistently a supporter and an advocate of C&C. Many others were too and here

The 'Economics of Genocide' was introduced into IPCC SAR (1994)
by Economists from the UK & the US

In the IPCC Second Assessment in 1994, UK and US economists introduced Global-Cost/Benefit-Analysis (G-C/B-A). As all the 'costs' of Global Warming had to be included in this tally,the cost of the 'mortality' due to climate change had to included. This in turn required that these deaths had to be estimated, totalled and converted to a 'cash-value'.

'Contingent markets' were created for this valuation. This turned out to mean that the climate-change-related death of a person was proportional to the income of that person while alive. This in turn resulted in the infamous 'average' where the cash value of fifteen dead Chinese people equalled one dead English person. Inevitably, there was a huge row about this.

The difficulty was that economists demonstrated it was cheaper to kill people than solve the problem. Consequently GCI argued that the 'logic' of this ideology was the 'economics of genocide', whereas solving the problem, meant choosing the C&C framework over guesswork and that this was and still is the non-ideological choice.

Some Resistance was mounted against this methodology

Incensed at the row generated by his 'harmless' technique, Professor David Pearce called the campaign against it, "the stupidest campaign in history". Professor William Nordhaus wrote an angry letter to GCI saying, "if you don't like it being done in $s, you can have it in spotted-owl-equivalents."

A sharp response to David Pearce was sent by UK Ambassador Sir Crispin Tickell, "I beseech you in the bowels of Christ, think it possible you may be mistaken." The response to Nordhaus was simply to ask, "why, if a spotted owl equals a spotted owl, doesn't a human equal a human?"

This argument has run and run

ASSUMPTIONS

In view of the 'existential threat' posed by the accelerating rates of global climate change,
perhaps its time to be addressing the existential threat of sustaining False Dichotomies

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Back to the 'Carbon Budget Support'
Back to All Country Carbon Budget Credit/Debit Introduction

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Contraction and Convergence (C&C) - 'The Well Tempered Climate Accord'
(The unity of 'Equity = Survival').

A non-ideological overall framework - a unity - is jointly & severally required to interrogate, negotiate & integrate UNFCCC-Compliance on the full-term, integral basis of: -

• precaution
• inclusivity
• urgency
• equity
• adequacy
• completion

C&C was created by GCI in 1995 to that purpose. It was to integrate the full-term international process of UNFCCC-Compliance.
This requires the arrest of atmospheric GHG accumulation curving upwards so it gradually curves downwards to a level pre-judged as 'safe & stable' (e.g. at least 350 ppmv).

This means first setting out the whole emissions-contraction-event (the path-integral) consistent with that. So the methodology of any contraction-&-convergence-based-path-integral of future global GHG emissions deliberately embodies the sequencing structure of a UNFCCC-Compliant C&C proposition where the: -

• international emissions parts always commute with the global total path-integral (as convergence is a function of the 'contraction-event' and not vice-versa)
• with the given weight contracting down to zero by a given date whatever the UNFCCC-Compliant rates, weights & dates agreed by the users
  
  Structurally sequencing this way requires a fixed universal (everyone) joint/several reference standard and this is used specifically: -
  
  
• to avoid the reverse, where trying to make the contraction-event a function of myriads of contestable convergence assumptions results in randomness,
• instead of ab initio the coherent goal-focused process needed for compliance in a structure defined by the deliberate commutation of the whole and its parts.
  
  i.e. continuing to do too little too late with emissions control & so deepening non-compliance, results from non-commutation, as precaution & prevention continue to be subordinated to structureless 'growth differentials' in the arbitrage of beggar-thy-neighbour.
  

Logical Assumption (beyond belief)

Equal Temperament or 'Well Tempered Tuning', means tuning the 12 semi-tones equally within the fundamental doubling structure of the musical 'octave'. The classic example, J S Bach's 'Well Tempered Clavichord' (1721), assumes equal semi-tone steps & remains the classic expression of equal temperament.

The key points arising from this are: -

• equal temperament enables music to be written in, tuned in, played in and to modulate between, all 12 musical keys,
• this 'well tempering' simply means that all combinations in all keys always commute as equally 'in-tune' and 'in-time'.
  
  Where and for these same reasons C&C (1994): -
  
  
• assumes equal per capita or 'Well Tempered' emissions rights globally, with a base-year for future population sizes,
• enables any rates/weights/dates of a C&C carbon budget to be calculated and shared, so the total always commutes with its 'well tempered' parts,
• the process of carbon-containment as a whole can be precisely aimed at a UNFCCC-Compliant outcome for atmospheric GHG concentration.
  

GCI intentionally nick-named C&C, 'The Well Tempered Climate Accord' to underline the non-ideological properties of this methodology.

For illustration, a recently created 'user-chooser' C&C animation with 1,000,000 possible rates of C&C - that always commute - is here.

Back to the 'Carbon Budget Support'
Back to All Country Carbon Budget Credit/Debit Introduction

Addressing the false dichotomy between Logical & contestable & conflicted left/right Ideological Assumptions (or 'beliefs')

Since 1992, ideological assumptions have obscured the sine-qua-non for UNFCCC-Compliance, a non-random internationally inclusive path-integral for a limited & declining future weight of emissions globally on a precautionary and preventive basis i.e. completing a full-term C&C 'event' as quickly as possible.

In 2008 Professor Ross Garnaut advanced a significant but residually ideological statement about C&C saying, "(it) has the virtue of simplicity. Equal per capita emissions is a natural focal point. Contestable computations based on economic variables do not need to enter the allocation formula."

Recognizing economic variables as 'contestable' was certainly an improvement on the earlier 'ideological charge' laid by John Ashton of the UK Foreign and Commonwealth Office (FCO) who stated in 2002 that, "C&C is compelling, yet at its heart lurks a contestable ideological assumption; equal per capita emissions as rights".

Earlier still in 1998, British sociologist Professor Anthony Giddens claimed that the radical center is synonymous with the Third Way. For Giddens, an advisor to former British Prime Minister Tony Blair, and for many other European political actors, the Third Way is a reconstituted form of the ideological compromise know as 'social democracy'.

Perhaps for these reasons, Anthony Giddens was consistently a supporter and an advocate of C&C. Many others were too - and here

However - and this is the guts of it - all of that recognized as the granularity of 'real-politik',
GCI has nonetheless argued from the outset that it is ideological not to make the 'well tempered' assumption.

Why?

Important as 'equal rights' per se are (or may or may not be to some), unless we 'well temper' global emissions rights as 'equal', full-term modelling emissions control-rates globally makes UNFCCC-Compliance unachievable, as contraction simply becomes the random result of an array of conflicting second-order assumptions about convergence.

In the the real world, unless we choose a 'framework' based on making the well-tempered assumption, we remain stuck in a process of real-politik distorted by socio-economic
'guesswork'. In the worsening politics of accelerating rates of climate change, this is comparable to playing Russian Roulette with more and more loaded chambers.

A framework-based market is required; a truth persistently ignored.

This is obviously the case when, as 'business-as-usual' time runs forward, the amount of carbon available for the contraction-event needed for UNFCCC-Compliance is shrinking.
This means it needs constantly to be revised downwards to reflect this.

As the last 30 years have tended to demonstrate, use of this roulette-model has been progressively decreasing the odds of UNFCCC-Compliance, while increasing the odds of the
'looming climate catastrophe for mankind' alluded to by Sir David King at the IEA in January 2016. Consequently, as we accelerate out of control towards the 'event-horizon' of global carbon consumption the other side of which is the 'irreversibility' of runaway rates of climate change, the strength of the well tempering proposal increases.

GCI argued in IPCC Second Assessment (1994) that, intentionally or not, the reality of this roulette was revealed as the 'economics of genocide' as analysts demonstrated that was cheaper to kill people than solve the problem. Solving the problem means choosing the C&C framework over guesswork. In other words, a framework-based market is a non-ideological choice.

The complete full-term expression of this (covering the period 1750-2050) was finished in 2015, in conjunction with Plan B - Plan B has commenced a climate litigation campaign as argued for example in this evidence to the High Court.

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Is the 'feminine principle' half the whole truth or half of a false dichotomy or 'Dominant'?

The Guts of it - it is ideological NOT to make the 'non-ideological' 'Well Tempered' assumption.

This is the guts of it - all of the above recognized as the granularity and 'diplomacy' of 'real-politik' - GCI has nonetheless argued from the outset that it is ideological not to make the 'non-ideological' 'well tempered' assumption. Since 1989, GCI has held this view until the present day.

It underpins Plan B's court-case in the Royal Courts of Justice.