May I humbly suggest that the Bible has the answer? Genesis tells about the fall, which doomed all men to be born with a sin nature. I will admit I can't explain why God would let evil enter the world; that's the question that I've never heard the answer to. I rest in the fact the God's ways are higher than mine. If we will repent and believe that Jesus came to pay the penalty for our sin, we can be forgiven and spend eternity with God. You're exactly right, we cannot fix this mess, but I choose to believe that God has given me a mission and a message. Part of that mission is stand against the injustice we are seeing now and take a stand for the vulnerable. Take care.