Contraction & Convergence is an eminently sensible solution, however can you honestly see the American, European and other developed governments giving up any part of their standard of living without a fight, they'd much rather fight it out in the Middle East for the remaining oil, and watch runaway climate change destroy the world, than risk disturbing the capitalist hegemony with idle talk of an equitable sharing of resources.
Meanwhile the Indians and Chinese are knocking hard at the door, and having been poor for decades they are unlikely to concede any of their hard fought share of global resources to the poorer countries of the world.
Now we see that even London voters along with the rest of the UK have chosen to swing firmly to the right, supporting the cause of the corporate elite in the name of economic development at all costs, the primacy of 'standard of living' over 'quality of life', individualism and consumerism over the building of communities, what chance is there for advancing the idea global equitable solutions to global problems?
Instead I see us blaming the poor, and hoarding our advantage, a 'send em home' philosophy to immigrants that try to come here due to the wars and starvation our government is complicit in causing.