Now that I think about it, our biggest problems are at their core a result of human nature. If everyone on Earth made an effort to become something better than what they are, and if we all worked together, and if we made the petty sacrifices none of us are willing to make (such as getting rid of money),its unlikely we would have many problems left to deal with.
The one problem I CAN'T see us being able to fix is, like MaxTheReaper said (in his own way XD), overpopulation
So ya, three big problems for humanity imho: Money, Human Nature, and Over population. The first two can, but almost definitely never will, be solved. The last one I can't imagine being able to solve without finding new planets to live on (seriously).
Btw, We can't say "the world's" biggest problems.
Just my 2 cents. XD
The one problem I CAN'T see us being able to fix is, like MaxTheReaper said (in his own way XD), overpopulation
So ya, three big problems for humanity imho: Money, Human Nature, and Over population. The first two can, but almost definitely never will, be solved. The last one I can't imagine being able to solve without finding new planets to live on (seriously).
Btw, We can't say "the world's" biggest problems.
Just my 2 cents. XD