sentences:  In either case, the working hypothesis is generally that policy is chiefly based on the pursuit, possession and application of power (see also power politics).However, some international relations realists, such as Kenneth Waltz, have viewed state policy in terms of the pursuit of survival or security, rather than the pursuit of power for its own sake.See political realism for branches and antecedents more relevant to contemporary diplomacy and the particular modern, international relations paradigm.