In communist states, the constitution was a tool to analyse the development of society. The Marxist–Leninist party in question would have to study the correlation of forces, literally society's class structure, before enacting changes. Several terms were coined for different developmental states by Marxist–Leninists legal theorists, including "new democracy", "people's democracy" and the "primary stage of socialism". This is also why amendments to constitutions are not enough and major societal changes need a constitution which corresponds with the reality of the new class structure.