A state performs the following functions except "encouraging the struggle for power".
Explanation: A state is a political entity that is responsible for the welfare and protection of its citizens. The state performs various functions that are essential for the well-being of the citizens, such as promoting their welfare, providing social services, and encouraging trade with other states. However, encouraging the struggle for power is not one of the functions of the state. In fact, the state is responsible for maintaining law and order and ensuring that power is not abused or misused. The state also provides a framework within which different groups can compete for power in a peaceful and orderly manner, such as through free and fair elections.