What philosopher argued that humans act only out of self-interest and are material bodies?

Name: What philosopher argued that humans act only out of self-interest and are material bodies?
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Hobbes is known for his theory of psychological egoism, which asserts that all human actions are motivated by self-interest. He also believed that humans are purely material beings, rejecting the idea of a soul or immaterial spirit.

What Philosopher Argued That Humans Act Only Out of Self-Interest