Strategic studies concerns the use of force as an instrument of state policy, deriving from Clausewitz's notion of strategy as "the use of engagement for the purpose of war." Traditionally, strategic studies focused on how wars start and are fought efficiently. However, recent thinkers argue that strategic studies embodies using military power to achieve political objectives and involves coordinating all national resources toward goals. Strategic studies is interdisciplinary and draws from fields like politics, economics, and social sciences. It remains important because war is still a serious matter and military power influences international politics, though critics argue it is too state-centric and does not consider ethical issues.