Important Note

Tufts ended funding for its Open Courseware initiative in 2014. We are now planning to retire this site on June 30, 2018. Content will be available for Tufts contributors after that date. If you have any questions about this please write to

Tufts OpenCourseware
PREV : 2050 NEXT : Modern View of Risk
Author: Jeffrey Griffiths, M.D.
2000 Superimposed on 2050