The way I look at it is this: God could've created a perfect world, with no such thing as evil. We could've been just mindless drones who does everything God says like a robot. But God didn't make us that way; he gave us free thought. He acts as our guide, but not as our puppeteer. (Or as he puts it, the shepherd to the lambs.)
God could've just drown the whole evil world like he did with Noah, but he chose not to. The world was saved not by a flaming giant descending from the flaming sky, but by a small child being born in a stable to a mother not important enough to get a room at the inn. Us, with free-thought, were left the task to "prepare his room to welcome him" AKA rebuild the world. And you must admit, the world is a better place than it was 2000 years ago.
We all take it for granted the laws and general compassion of man, but it wasn't always like that. You think we have wars now? Peace barely extisted; democacy didn't exist. It took the ideas of a revolutionary reformer to even spread the
idea of peace. But you must remember that peace and freedom takes work. We had to fight the many dangers such as fascism, communism, dictators, sometimes even the church itself. (Even other Christians can be a barrier to God. As Gandhi famously said: "I like you Christ, but not your Christians. Your Christians are so unlike your Christ.")
If all things just
happened, and all was just simply good, how would we know what "Good" even was? How would we know "peace" had we not know "war"? How would we have known "Love" if there was not "Hate". Evil itself cannot and will not be destroyed forever. What we can do is live our lives to the best that it can be. Love until it hurts:
http://www.biblegateway.com/passage/?search=1+Corinthians+13 , whether it be through Christ, other religions or through non-faith, the journey must be taken.