The first major animal protection law was the UK’s Cruel Treatment of Cattle Act of 1822, nicknamed "Martin’s Act." Shortly after, the Royal Society for the Prevention of Cruel to Animals (RSPCA) was founded. The focus was on draft horses beaten in the streets and dogs forced to fight. The goal was not to end ownership, but to end egregious torture.

During the environmental movements of the 1970s, philosophers began pushing boundaries. In 1975, Australian philosopher Peter Singer published Animal Liberation . While Singer actually identifies as a preference utilitarian (a welfare position for sentient beings), his work argued that the capacity to suffer—not intelligence—is the prerequisite for moral consideration. He coined the term "speciesism," comparing discrimination against animals to racism or sexism.

Whether you stand firmly in the camp, fighting to make the cages larger and the deaths swifter, or you march in the Animal Rights camp, demanding the doors of the cages be thrown open entirely, you are part of a necessary evolution of conscience.

You are likely a "conscientious omnivore." You will pay extra for "Certified Humane" or "Free Range" labels. You support zoos that are accredited by the AZA (Association of Zoos and Aquariums) for their conservation work. You might wear wool or leather, but you oppose mulesing (painful removal of skin from sheep) and toxic tanning methods.

Francione advocates for a strict enforcement of the principle. If an animal has a right to life and liberty, you cannot kill it humanely for a sandwich.

History shows that welfare reforms are the gateway to rights. As the public grows uncomfortable with factory farms, they switch to "cage-free." As they realize cage-free still involves debeaking and high mortality, they switch to "pasture-raised." Eventually, they realize the logical endpoint is plant-based. Conclusion: The Moral Universe The arc of the moral universe is long, but it bends toward inclusion. Two centuries ago, the law allowed the torture of cats and dogs for entertainment. One century ago, laboratory animals were considered "animated tools" with no legal standing. Today, several countries have recognized animal sentience in their constitutions.