In this AHC,you need to have a particular POD post 1900 to have the Human civilization enter the Transhumanist era by 2015. The qualifications for this is that we are powered by an overwhelming majority with renewable and sustainable energy,have at least two thirds of the population of the World with upgraded brains and bodies by 2015. Another condition is that these upgrades should be available to the 100% of the population irrespective of wealth status to whoever wishing and willing to get them. You are at liberty to choose your POD but keep it plausible and elaborate a bit.