Humans

[The Man in Black]

Here's an interesting question: do you believe that the human species is more of a virus to its habitat, or more of a protector of its home world? Watching "The Matrix" reminded me of this, when Agent Smith is talking to Morpheus about humans. He makes a solid point that really the only other organism on this planet that hasn't found a niche without having to spread to stay alive is the virus. An interesting side note is that viruses ride the boundary between our definition of "living" and "not living", because they only meet the requirements of being "alive" when they are within a host. But another idea is that humans are here to be protectors of this planet. While some say we may not do an amazing job, we actually are developing means to protect our home world from asteroid attacks, etc...

There are many sides to this debate, I just presented two semi-opposing ones.