Take Robert’s word for it.  Everyone should watch these lectures.

http://www.floatinguniversity.com/lectures–2

The Floating University’s first course, Great Big Ideas, is composed of 12 professionally produced video lectures ranging from 40-60 minutes in length. Below is a listing of every subject covered by Great Big Ideas, presented in the order suggested by the syllabus. You can take in the material in the same progression as students at Harvard, Yale, and Bard, or skip around to best suit your interests. Click on a lecture title to jump to the full video, accompanied by supplementary materials prepared by experts to get the most out of every lecture.