Reason for Christianity

People always want reasons for God's existence and although this has not been well thought out my be yet, I was thinking that the fact there is not as much chaos in the world as there could be is good evidence. For instance think if all were to just live for themeselves with no concept of a higher being or a right and a wrong we would have a mass world of rampant thieves and terrorists. No one would give to others. So maybe this only proves the point that there are some rights and wrongs, but I think if you kept going deeper with that thought it would lead you to the need for some higher being.