But they cannot expel the human spirit from human nature.

What is that?
At bottom, love of self, self-interest, selfishness individual and corporate.

As a theory, the philosophy of selfishness has often been exposed.

But, to an extent that is difficult to exaggerate, it has been the motive, acknowledged and relied upon without shame or apology in commerce, in politics and in practical life.

Our civilisation has been based on selfishness, our commerce on competition and the unrestricted love of wealth, our education on the motive of self-advancement.