Sentence:  Their failure helped produce the widespread <WSD>malaise</WSD> reported by Thucydides: the Athenians "grieved over their private sufferings, the common people because, having started out with less, they were deprived even of that; the rich had lost their beautiful estates in the country, the houses as well as their expensive furnishings, but worst of all, they had war instead of peace" (2.65.2). 
Meaning of the word marked with <WSD> tags:  An ambiguous feeling of mental or moral depression.