Sismondi is known for the study of economic crises rooting from “the social ramifications of the economic system rather than on its structure.” His interpretations put him before Marx, in semi-defining the bourgeoisie and proletariat division in society. Key to his philosophy, Sismondi saw these class divisions to coincide with crises in the economy and didn't see extreme social reform as the answer, but rather moderate versions that allowed for technological advances to be slowed for the economy to catch up, via limiting production and the limitation of what he referred to as “the prevailing glorification of free competition”, all while, most importantly, allowing individuals to retain private property and any revenues generated from it.