The Commonwealth, subjected to almost constant warfare until 1720, suffered enormous population losses and massive damage to its economy and social structure. The government became ineffective in the wake of large-scale internal conflicts, corrupted legislative processes and manipulation by foreign interests. The nobility fell under the control of a handful of feuding magnate families with established territorial domains. The urban population and infrastructure fell into ruin, together with most peasant farms, whose inhabitants were subjected to increasingly extreme forms of serfdom. The development of science, culture and education came to a halt or regressed.