Explanation:

- Option 1: T. Hobbes

- An influential philosopher known for his work on political philosophy.

- Authored "Leviathan" which discusses social contract theory.

- Not related to "The Origin of Family, Private Property and the State."

- Option 2: Darwin

- Charles Darwin was a naturalist, famous for his theory of evolution.

- Known for "On the Origin of Species."

- His work does not involve the topic of family, property, or the state.

- Option 3: Huxley

- Thomas Huxley was a biologist and great defender of Darwin’s theory of evolution.

- His writing focused largely on biology and science.

- Did not author the work in question.

- Option 4: F. Engels

- Friedrich Engels co-authored "The Communist Manifesto" with Karl Marx.

- He wrote "The Origin of Family, Private Property and the State" exploring societal development.