Chris is a finical observer and scientist with some pretty interesting and insightful thoughts about the world we live in and the problems we are facing.
I highly recommend that you find time to watch his videos in order, they are fascinating.
But it can be kind of terrifying to think that the wonderful economic system that supports our modern lifestyle is based on generating debt that assumes the future will always be larger and more productive than the present, but ignores the fact that we live on a spherical planet with finite resources.
Follow this link if you're interested: http://www.chrismartenson.com/crashcourse
(this might be an interesting blog for people to try out the new comment features on!)