Photo by manhhai | CC BY 2.0
Back in October 2016 I wrote an analysis entitled “Natural Born Killers? It described and commented on research on the origins of human violence published in the science journal Nature. The conclusion offered in the article is that humans come from an evolutionary line that has the capibility for violent behavior genetically built into it. It is a reasonable hypothesis. As just about every serious historian knows, the human propensity for lethal violence goes back as far as the evidence can take us — so far that there can be little doubt that this trait is inherited from our pre-human ancestors.
Yet, as the Nature scholars also point out, in the case of our species, culture has the ability to “modulate our bloodthirsty tendencies.”
I bring this up now because there is new interest in the slaughter and massacres that took place during the Vietnam War. This may in part be a response to the fact that last month (January 2018) marked the 50th anniversary of that war’s Tet offensive.
America waged war in Vietnam roughly from 1961 to 1975. The starting date is a “rough” one because the United States never actually declared war. In this 14-year span it is generally accepted that the turning point in the struggle came during the Tet offensive 
of 1968. Tet is the term used for the Vietnamese new year, and that celebratory time in 1968 was when the North Vietnamese and the Vietcong launched attacks in some 100 South Vietnamese towns and…