Rewards are another most important j method of exercising power. It can be material, economic and political. Various kinds of economic aid and grants in aid help in winning support and inducing a change in the behaviour of other states.
Similarly, conferring honors to people of other states also helps as psychological rewards intended to keep the other states friendly and cooperative. ;
The method of punishment is closely related to reward. For, an attempt to withhold a reward is also a punishment.
Speaking about efficacy of punishment as a method of power, Mohinder Kumar says “The most effective punishment is the one which is never meted out because the very threat of it should succeed in preventing the action of which the punisher disapproves and in getting a promise of an action or behaviour which the punisher desire”.
The force is the ultimate method of exercising power. It is closely related to punishment. But, the difference between force and punishment is the actual use of force versus the threat of use of force. War is the extreme form of exercise of force and is usually adopted as a last resort to exercise power.