To me, the only problem we have is "IGNORANCE".

Ignorance is the problem to me because. The world is already heaven.
I don't know how to explain this so that people will understand, but let me try.

Imagine if you were born knowing everything you know today from birth (being without ignorance). Do you think you can get poor?, Same goes to everyone.
Same goes to countries, the more enlightened a countries attend, that will determine their level of development. Also to every individual.

Having said that.
I hope you understands what i want you to understand.

Now final stage: ignorance is the reason you see arguments today, ignorance is the reason why you see fight today, ignorance is the reason why you see failure today, ignorance is the reason why you see terrorism today, banditry. E.t.c.

If you want to solve 80% of your problems. Any problem at all. Try and attain very high level of intelligence/being enlightened, if you could. You will be free from problems.

Personally i swear i don't have or see any problem since very long time ago. Just because i have the solution before any problem comes.