What will historians say about our time 100 years from now? How will our world be remembered? According to Lawrence Summers, economist and former President of Harvard, a civilization's legacy has more to do with the work of its many teachers and thinkers -- artists, scientists, writers, philosophers -- than with the elite few who hold positions of power in the political sphere. (Summers should know: he spent two years as Secretary of the Treasury under Clinton, and two as an advisor to President Obama.)