oh idk
Society
I would re-wind my life and go back to junior high, then HS and study my butt off.
the world
my family members' mentality of marrying guys of the same race and religion.. so I can be with my Muslim boyfriend...
sigh...
Restore the environment and bring peace to the world :). Without the environment we're dead.... Without peace we kill each other (so therefore we're dead).... With a ruined environment theres global warming ripping holes in ozone layer...
I wouldn't change a lot.
I would go back in past, and (as I said somewhere earlier) I wouldn't let my mother make a little piggy out of me.
I'm pretty satisfied with my life, so I would focus on the society, point out the mistakes they're going to make in future, and such.
I would try to make everyone happy.
The part of the brain that makes us Humans so, so Selfish towards each other. I mean i think that would be totally grand. :)