The iconic SSI Space Colonies catch the eyes and cause the emotional stirs, but once the reasons for them are understood they become obvious parts of a pretty powerful, positive and quite simple idea. 

If you haven't yet read "The High Frontier" or if it's been a while and all that you recall is the pretty pictures, this recording from the SSI Archives may make you want to give that classic book a grown-up look.

Space Studies Institute founder and first President Gerard K. O'Neill at Chautauqua Institution in Chautauqua, New York  July 23rd 1979.  A stimulating speech and fascinating Q&A On Good And Evil.

Enjoy.

SSI Gerard K O'Neill On Good and Evil

Space Studies Institute