Engrossing piece from edge.org below (linked in aldaily, where I found it), with a large number of thinkers answering the question “What will change everything?”  Interesting for the variety of perspectives as much as the content of some of the answers.  Guaranteed to make your brain get bigger, or at least provide some perspective on the world, for good or bad…

http://www.edge.org/q2009/q09_print.html