That reflection, right there, is the beginning of both welfare and rights. Resources for further reading: Animal Welfare Institute (AWI), The Humane League (welfare-focused), The Nonhuman Rights Project (legal rights).
For 150 years, welfare was the only game in town. Laws focused on "humane slaughter" and banning blood sports like dogfighting. The underlying logic was that humans had dominion over animals, but with dominion came the duty of stewardship. The philosophical shift began with Peter Singer’s 1975 book, Animal Liberation . Though Singer is a utilitarian (focused on suffering, not rights per se), his argument that the capacity to suffer—not intelligence or language—is the baseline for moral consideration was a bombshell.
That is changing. Courts are beginning to grant (the right to challenge unlawful detention) to great apes and elephants in Argentina, Colombia, and India. In 2024, the UK government recognized lobsters, octopuses, and crabs as sentient beings under the Animal Welfare (Sentience) Act.
Furthermore, AI-driven protein folding (like AlphaFold) is reducing the need for animal testing in drug development.
Tom Regan followed in 1983 with The Case for Animal Rights , arguing for inherent value. The rights movement took a radical turn: rejecting the "happy exploitation" model of welfare reformers. As activist Gary Francione put it, "Welfare regulations are like making the slave quarters more comfortable. They don't challenge the institution of slavery." To understand the friction, consider the "Humane Meat" paradox.
If you eat a hamburger tonight, you are a welfarist by definition. The question is not if you use animals, but how much suffering you are willing to fund . Buying the cheapest chicken is a welfare vote against welfare. Paying more for pasture-raised is a vote for welfare, but not for rights.