NO, war is not inevitable. In fact, war is becoming obsolete - not armed violence, not organized violence sponsored by some political groups, certainly not armed crime. But war as an instrument of state policy is nearly obsolete among advanced nations, even if the US has not gotten that memo yet. War is a highly organized form of theft, according to Jacob Bronowski, but, as nations become more affluent and as motivating scarcity evaporates, war will become a little if ever used method of theft, simply because theft itself, at the state level, will become unnecessary. This may not happen for 100 years, but it is the END of war that is inevitable.