Sentence:  But poverty's scourge is fiercest below $1.25 (the average of the 15 poorest countries' own poverty lines, measured in 2005 dollars and adjusted for differences in purchasing power): <WSD>people</WSD> below that level live lives that are poor, nasty, brutish and short. 
Meaning of the word marked with <WSD> tags:  (Used as plural of '''''person'''''); a body of human beings considered generally or collectively; a group of two or more persons.