>I haven't been able to put my finger on the exact reasons for the
>decline of anti-globalization protests in the U.S.
You mention 9/11, but also: the boom ended, and so did the Clinton years. Recessions are often bad for political activity, as fear takes precedence over hope. And people are busy opposing Bush and the Republicans; we need another Dem in the WH so they'll start protesting capitalism again.
Doug