Where is the youngest crust on earth is found? a) under the ice in antarctica b) at the peak of tall mountains c) along the fault line in california d) in the ocean along the mid ocean ridges

The answer to your question is D. in the ocean along the mid ocean ridges They are 200 million years old.

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.