James Kendrick teaches film studies, and Hollywood Bloodshed is an academic but readable history of how violence in American movies escalated through the twentieth century. He starts with the early codes that kept blood off screen and traces the changes through the New Hollywood era of the 1970s, the action movies of the 1980s, and the more graphic genres that followed.
Kendrick is interested in why the rules changed, not just that they did. Industry pressure, social attitudes, technical advances in special effects, and the shifting boundary between art house and mainstream all get attention.
This isn’t a book of opinions. Kendrick mostly stays out of the moral debate about whether screen violence is good or bad. He’s documenting what happened and why. For film students or anyone curious about the mechanics of how Hollywood handles violence, it’s a useful, careful book.