Humans have higher cognitive capacities (morality, language, abstraction). Therefore, human interests always trump animal interests. Rebuttal: If intelligence is the metric, then human infants and the severely cognitively disabled would also have zero moral value.
In the 21st century, the relationship between humans and non-human animals is undergoing a profound moral reckoning. For millennia, animals were legally classified as property—"things" without legal standing or inherent value beyond their utility to humans. However, a growing global movement is challenging this paradigm, demanding a shift in how we treat the billions of sentient beings that share our planet. At the heart of this debate lie two distinct yet often conflated concepts: animal welfare and animal rights . In the 21st century, the relationship between humans
, a modern utilitarian, radicalized Bentham in his seminal work, Animal Liberation (1975). Singer argues for the principle of equal consideration of interests . A pig's interest in avoiding pain is identical to a human's interest; therefore, ignoring pig pain because of species is "speciesism"—a prejudice as irrational as racism or sexism. While Singer is often called the father of the animal rights movement, he is technically a welfare reformer who supports incremental improvements while eventually advocating for abolition. At the heart of this debate lie two