This is the choice the rich world faces today, when discussing the climate. And the choice is even starker for the world’s poor. Spurred on by activists and campaigners, many global leaders are poised to pick the lower-growth pathway, condemning our children and grandchildren to a worse existence, and ensuring that the world’s poorest are trapped in a future with fewer opportunities, less prospects, and less welfare, to the tune of $500 trillion. Per year.