You are a social scientist? You do not pay adequate attention to trees, in my view (with a few exceptions). History is not only made with treaties signed under great trees, but history is made when forests move (ask Macbeth), or when orchards and forests are planted. Economics would be nowhere without a building to do the economics in, and that building most likely owes much of its structure to trees — as does our entire economy (checked lumber prices lately?). Don’t get me started on agriculture.
You have many good reasons to check out this compilation of posts, a web carnival, all about trees: Festival of the Trees #9. If you check carefully, you’ll even find some history involving Thomas Jefferson there.