There exists a future of artificial intelligence, rampant inequality and irreversible climate change. But there is also a future of abundance, where technology and good public policy leads to a better life for everyone. If you had the chance to take us back to the future -- to 2045 -- what future would you present?

This is heavy, Doc.

Turns out they actually did need roads.

The future is now! Today is October 21, 2015, and as any dyed-in-the-wool film buff knows, that's the very same date that Marty McFly and Doc Brown visit at the start of 1989's Back to the Future Part II.