Sources for Thucydides [Perseus]
   Four essays on Thucydides, by Cornford, Crane, Finley, and Hobbes, plus a translation of Thucydides' Peloponnesian War.
   http://www.perseus.tufts.edu/Thucydides/

Thucydides as Science
   Essay by Russell McNeil concerning Thucydides' contribution to social science.
   http://www.mala.bc.ca/~mcneil/lec18b.htm