The first crack in this armor appeared in 1822, when British politician Richard Martin passed the "Ill Treatment of Cattle Act," making it a crime to "beat, abuse, or ill-treat" horses, cows, and sheep. The press mocked it as "Martin’s Act," but the precedent was seismic: for the first time, a Western government acknowledged that inflicting unnecessary suffering on an animal was morally wrong.

Complete abolition of animal exploitation, including factory farming, animal testing, circuses, and zoos.

The current boundary of the circle is drawn around Homo sapiens . Animal welfare advocates argue the circle should expand to include suffering , regardless of species—but they accept that humans will still stand at the center, using animals as resources.

Where you stand depends on your answer to a single question:

Is the animal suffering unnecessarily? (Necessary suffering often includes slaughter or scientific procedures).