I think dense population is just another hurdle we humans have to get over. Just like eventually we have to be able to travel into space. It's just eveloution.
Right now it is the easiest it's ever been to be alive on this planet. So in many ways there have been positive impacts from civility and knowledge allowing a growing population to flourish.
We as the human race consume. That's what all life does. It's a natural cycle. We have to be more and more aware of our footprint on the environment and everything else surrounding us. So our mindset should always be, how can we learn from mistakes, how can we improve our lives, how can we preserve our planet, and continue to push one another in a positive manne. Instead of constantly berating ourselves as parasites.
Evolution has a funny way of correcting things on its own, but if we give it some time, thought, and effort, we may be able to make the world a better place for everything on it.