What are the grammar mistakes or words used not proper or anything you feel weird in this paragraph? I'm learning and need your help.
Butterfly Effect is a scientific term which means that, even a butterfly in the Amazon rainforest of South America with its wings fluttering gently is able to cause a tornado in America a few weeks after. The butterfly effect is also a name of a science fictional film whose leading role is a man named Evan able to go back to his childhood period by reading his diary of that time. When Evan went back from the past, just like the butterfly effect, things around him was totally changed because of his little different behavior when he went back child. However, this didn’t benefit Evan because he was always wanting to change his life by this and went back again and again, and, himself, his family, his friends and his love becoming in a more terrible condition every time he went back. To defeat this fate, to let others be able to have a happy life, Evan went back the last time to the womb of his mother, rounded his neck with the funicle, and died, giving his life and his love to the world he never born, to the people never meet him.