The declaration of independence
<span>Consumer demand for these products decreased because everyone already had what they needed from these companies. This ended up causing prices to fall which, in turn, led to the economy slowing down. This coupled with bank policies led to a bust in the economy that lasted the better part of an entire decade.</span>
Friedrich engles, though from a well to do family, established himself as a :
Revolutionary
He founded Marxist theory together with Karl marx
hope this helps