Paul Watson

Unlike human laws (and the Malthusian approach), the natural laws of ecology do not discriminate on the basis of race, status or bank account balance. Simply put, there are not enough resources on the planet to feed a human population that is growing and consuming like we are. We are killing the coral reefs, the forests, the wetlands and the oceans. And we are violating the third law of ecology: "There is a limit to population growth because there is a limit to the planet's carrying capacity." We are literally stealing the carrying capacity that could support other species, and that is a violation of the first law of ecology: "The strength of an ecosystem depends on the diversity of the species that make up that ecosystem."
Decreased biodiversity has an impact on everything else; it's the second law of ecology, the law of interdependence. In other words, the increase in the human population is contributing to a decrease in the carrying capacity, and that has an impact on our interactions with other species. It reduces our chance of survival even further and makes a future for us on this earth unlikely. The human population must stabilize itself and if we don't do it voluntarily, nature will look after it for us. Were that to happen, our numbers would be reduced in a very painful manner over which we would have no control. I am not religious, but I think that the four horsemen of the Apocalypse - famines, epidemics, wars and civil strife - will reduce the human population and [bring about] the loos of planetary carrying capacity. (p. 118-119)