Really Great TED talks....

http://www.ted.com/index.php/talks/chris_abani_muses_on_humanity.html

http://www.ted.com/index.php/talks/philip_zimbardo_on_the_psychology_of_evil.html

http://www.ted.com/index.php/talks/majora_carter_s_tale_of_urban_renewal.html

http://www.ted.com/index.php/talks/al_gore_on_averting_climate_crisis.html