You'll be in good company singing about human folly. There have been many songwriters who tore into that topic including
Bob Dylan
Frank Zappa
The Fugs
Warren Zevon
Sparks
Randy Newman
Dead Kennedys
Neil Young
Dead Milkmen
The Smiths/Morrissey
Dave Mustaine/Megadeth
Ween

Some of them are funny (Zappa, Fugs, Sparks, Milkmen, Morrissey, Ween), some are serious (Nirvana, Neils, Megadeth, Dylan, Zevon) and some are just plain mean (Nick Cave and Lou Reed but I didn't list them). But they all wrote great songs by the dozen. Check them out online if you want an extra boost or feel like stealing a line or two; they all have their complete lyrics available for you to PR/superread.

Musically you're sort of on your own because I don't know what style you prefer to play. Keep us posted on your progress.

[This message has been edited by x (edited October 12, 2002).]