Psychedelics have their ups and downs, but perhaps their best quality is their ability to enhance perspective. Being able to understand different points of views probably will change humans.

Just recently there was an article on the front or second page of hacker news which claimed caffeine and alcohol are responsible for civilization. (http://www.usatoday.com/story/opinion/2017/02/28/alcohol-caf...)

I can't even imagine what our distant future holds as psychedelics become more accepted, but it is extremely encouraging given the mindset of our current leadership!