Sentence:  After this holocaust , a changing world occupied the minds of men ; a world beset with new boundaries , new treaties and governments , new goals and methods , and the age-old <WSD>fears</WSD> of aggression and subjugation - hunger and exposure . 
Meaning of the word marked with <WSD> tags:  an emotion experienced in anticipation of some specific pain or danger (usually accompanied by a desire to flee or fight)