What if you could time travel... What would you change.

The world has a lot of things I know it would
Change if it had its chance... Like ridding itself of
Mankind; I guess when creation created us
It was very proud and ready to help us
Evolve, though as we are killing it millions of
Years later, We would vanish if it had its chance;
So what of you? What would I change...
What would I be or not have become;
The world is full of many a possibility;
But if one could change the past... Aren't they
Able to change their future; its basically the
Same thinking, though reversing to change past
Is always easier than making an effort to
Change the future, as how you seek it to
Be, through working towards the desired goal.