You are seeing only this particular earth, but you do not know what is happening in the whole cosmos. If you widen your vision to the entire creation, you will never put a question like that afterwards. They say the evolutionary process is like the movement of a wheel. The spoke that is above will come down, and that spoke which is down will go up after some time, so nothing is in a permanent position. Today the world is in one condition, tomorrow it will be in another condition.
Nothing is permanent, static or in one position only.
Everything is a flux, finally aiming at Self-realisation of the universe. A total merging of the universe in the Absolute is the purpose of evolution. Many people in the West fear that, because of man's selfishness, perhaps we will wipe civilisation off the earth, without evolving. We will destroy ourselves, instead of becoming better. The world cannot destroy itself.