[kzrdude]

Every species of organisms has potential for exponential growth - fill their niche. No organism has potential to grow without bound on just one planet, so there is a maximum number of individuals possible in the ecosystem. How many exactly depend on the environment and the other organisms in the ecosystem.

Human life is beautiful. Dolphin and butterfly life are beautiful. They are not in exactly in competition, but they have something in common which is that we can't grow their population size without bound.