Thucydides' History of the Peloponneian War

Could Thucydides 431 B.C. history indeed supply all we need to know about war?
http://www.independent.co.uk/opinion/commentators/fisk/robert-fisks-world-from-the-fourth-century-bc-words-our-leaders-should-heed-965479.html

http://classics.mit.edu/Thucydides/pelopwar.html

http://www.fordham.edu/halsall/ancient/eb11-thucydides.html

Sophocles and 'post traumatic stress'???
http://www.npr.org/templates/story/story.php?storyId=97413320