The underlying emotional systems that guide humans are almost certainly very similar to those that guide chimpanzees. In Joseph Conrad's classic Heart of Darkness, Kurtz dies after learning the truth of - and succumbing to - the dark side of human nature. Now, it seems, science <a href="http://abcnews.go.com/sections/science/DailyNews/chat_wrangham990603.html">has validated Conrad's theories of human nature.</a> The findings are based on observations of the warfare behavior of chimpanzees in the Kibale forest of Uganda. They claim chimpanzees are 'time machines' - so genetically similar to us that they are most likely what our own ancestors looked and acted like 6 million years ago. Surely this team of researchers is hardly the first to draw such conclusions. But where does anthropomorphism end and a study of evolutionary history begin? Even if chimp behavior does reveal the roots of human behavior, does that exclude the possibility of progress? One of the questions answered <a href="http://www.bostonphoenix.com/boston/news_features/top/features/documents/02537776.htm">here</a>.