[strictlyaminorleaguer]

I've read this thread carefully, and I don't see that anyone's mentioned "In the Year 2525." Although one verse could be read as an environmental statement ("he's taken everything this old earth can give, and he ain't put back nuthin' woo-wo"), the gist of the song is anti-Brave New World. It may have been left off because it consistently makes all-time worst songs lists. I'd also nominate "This Land is Your Land."