"they" : we're talking about the literature that's survived. Where killing all the men and selling the women & children into slavery after capturing a city was

"they" : we're talking about the literature that's survived. Where killing all the men and selling the women & children into slavery after capturing a city was standard practice. Please cite some of the "Plenty of ancient literature is concerned with these things." The word "sociopath" gives you away. Nearly every ancient hero could be thus described.