The animal welfare movement has roots stretching back centuries, evolving from philosophical arguments about animal sentience to legislative reform and scientific welfare assessment. Understanding its history illuminates where we are and where we need to go.
The history of the animal welfare movement is a story of expanding moral consideration. Early advocates focused on preventing obvious cruelty; later generations raised questions about the legitimacy of using animals for food, experimentation, and entertainment regardless of how they were treated. The movement has achieved remarkable legislative and normative progress over two centuries, but progress has been uneven across species, geographies, and sectors. Factory farming has emerged as a massive welfare concern that dwarfs the scale of earlier targets. The next chapter of the movement will likely be defined by the effort to bring the billions of farm animals into the circle of moral consideration.