Agent Smith (Matrix Trilogy) has started the Agent Smith Syndrome. Agent Smith hated seeing humans destroying the world they are living in. Smith hated seeing humans killing eatch other. Smith didn't understand why humans have to define their existence through misery and suffering.
Agent Smith started the Agent Smith Syndrome: "I'd like to share a revelation during my time here. It came to me when I tried to classify your species. I realized that you're not actually mammals. Every mammal on this planet instinctively develops a natural equilibrium with the surrounding environment but you humans do not. You move to an area and you multiply and multiply until every natural resource is consumed. The only way you can survive is to spread to another area. There is another organism on this planet that follows the same pattern. Do you know what it is? A virus." (quote: 'Matrix')