Reflect on what our population growth means.
10000 years ago human beings their animals for food their beasts of burden their pets = 0.1% of all mammalian flesh on the planet
At the beginning of the Industrial revolution it was 10-12%
Today it is 96-98%
Update: 90% of the fish in the sea has now been eaten by us.
Today we can count not only mammalian flesh but also all the fish in our equation.