Challenge accepted: Humans have been parasites to the Earth. Proven by how we created the "Dust Bowl." Gasoline created the ozone layer. Think of how many butterflies you see today compared to past years. If you are young then please ask an older person. 

That's just the Earth. 

The exploitation humans have done (still do) to one another is worthy of many talks. 

 The hate is spreading.  Kill all humans!