What was Darwin's role while he was aboard the Beagle on the voyage to South America?

you did not attach the discourse, but i assume it to be the discourse on the origin and basis of inequality among men (the original titile in french is: "discours sur l'origine et les fondements de l'inégalité parmi les hommes"), also know as "second discourse". in this discourse, jean-jacques rousseau emphasizes that private property is the basis of all inequalities.

therefore, what enabled the old regime to maintain as long as it did was private property.

feral cats are estimated to eat tens of millions of native animals each night in australia

it is a limiting nutrient limited by a single nutrient in the ecosystem, & the single goes very slow.