Cover of On Killing

On Killing

The Psychological Cost of Learning to Kill in War and Society

by Dave Grossman, Lt Grossman · first published 1995

50mentions
21recommended by
41HN commenters
2009–2026first – last mentioned

51% recommend41% neutral7% critical

Why HN recommends it

Examines the psychology of killing: how militaries condition soldiers to overcome an aversion to it, why it takes a toll, and how veterans cope. Suits readers curious about war, PTSD, and conditioning.

Common criticism: Its core research, S.L.A. Marshall's firing-ratio data, is widely considered fabricated

Summarised by Claude from recommending comments

The good news is that most soldiers are loath to kill. But armies have developed sophisticated ways of overcoming this instinctive aversion. And contemporary civilian society, particularly the media, replicates the army's conditioning techniques, and, according to Lt. Col. Dave Grossman's thesis, is responsible for our rising rate of murder among the young. Upon its initial publication, On Killing was hailed as a landmark study of the techniques the military uses to overcome the powerful reluctance to kill, of how killing affects soldiers, and of the societal implications of escalating violenc

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Mentions per year

80 2007: 0 mentions2008: 0 mentions2009: 2 mentions2010: 0 mentions2011: 4 mentions2012: 4 mentions2013: 3 mentions2014: 3 mentions2015: 4 mentions2016: 2 mentions2017: 2 mentions2018: 1 mention2019: 3 mentions2020: 3 mentions2021: 1 mention2022: 8 mentions2023: 2 mentions2024: 0 mentions2025: 1 mention2026: 2 mentions200720172026

What Hacker News says

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