He was unable to prove his theory because he didn't have any proof.
Marx and Engels begin The Communist Manifesto with "A spectre is haunting Europe" because they wanted to warn the bourgeoisie and the elite class that their movement is strong and it is not going to stop until Europe is classless. Literary effect: the movement is mainstream. Political effect: the movement is powerful.
<span>In the state of nature</span>
The economy was largely based on agriculture
The answer to this is B, hope it helps.
