By 2050 we could all have 100% renewable energy, green agriculture, healthy biomes inside us and out, new materials, a NG space exploration, medical miracles and a 60 generation handle on global warming.

What is stopping us? It is the oligarchic capitalism and tax structure as Stu mentioned. What I would add is that Trump is the perfect storm that has thrown us off course. In that, he is the problem and obstacle to an ideal 2050.

Something bigger than a million Trumps will still continue to block our way. The criminal mind and senseless arms race. Religion and the other God businesses haven't made progress in this nuclear age. I see an independant growing moral center gaining stre without help from the old corrupt systems.