There are far too many people. This is as much a result of the technologies that are leading to catastrophic climate change as climate change itself. Fossil fuel hungry technologies have led to a huge growth in the population of the earth which has, subsequently, demanded more from those technologies which, in turn, has led to more pollution and a greater strain on the world's natural resources. It is a vicious circle.
If we do not reduce the number of people as radically as we need to reduce our pollution of the earth's atmosphere then, whatever we do, we will not stop our self-regulating ecosystem from stopping us with dispassionate efficiency.
Global warming is our enemy but, in the long term, it will be our planet and it's organic life's friend, with or without the human race.