imagine de lennonDo you know any songs that talk about all the messed up things in this world?

Songs that talk about global warming, war and all the bad things happening in the world.Or the perfect world.
examples would be John lennon imagine, kudai lejos de aqui, mana arde el cielo, linkin park shadow of the day.

Hands Held High by Linkin Park
black eyed peas have one- i forget the name. but its iimagine de lennonn their album elephunk. and linkin park has another (sorta): what i've done. it's sorta like someone wanting to completely restart with a clean slate.
Hush-Usher,,,Good Song!
"Inner City Blues (Makes Me Wanna Holler) - Marvin Gaye
"We Didn't Start The Fire" - Billy Joel. Excellent.
Dancing With The Devimagine de lennonil-Immortal Technique
Here's an oldie but a goodie..."Give a Damn" by Spanky and Our Gang. It's from about 1968 or so.
tupac, changes
Change T'pain it is about if he could change the world and rid of all the problems
We didn't start the fire... by Billy Joel