There are too many things to be concerned about. A human being, as much as he/she may want to, CANNOT actively care about everything wrong in the world. We simply dont have the capacity. We cant give to every need or even feel passionate about it.
We can pray, but most of the time, that is all we can do. If our Father leads us to be more intimately involved in a certain cause or need, then of course, we obey.
I'm personally involved in church planting, Bible schools, children's homes, and such in the 10/40. But I dont expect everyone to jump on board with the same things in the same places.
"Cast your cares upon Him, for He cares for you."
Pray and obey. Leave the rest to God.