Yeah, war is good because it restores the balance that was lost when death rates declined in developing states. You can't sustain a population of our size with our demands at the same time. Technology can only go so far, but our habits and way of life are just as important to change.
The Earth's carrying capacity is only so great and although we can push it with technology. What population we have at the moment is beyond the Earth's carrying capacity, but we're sacrificing future needs for the present. We are going to have to realize that more people will only push demand for resources higher while supplies dwindle even faster.
Choice: what would you prefer? A cheaper way of life and more children, or living well with fewer people and more abundant supply of food and energy?