Introduction: Animal welfare

The idea that some lives are less important or deserve less respect than others is at the root of many of the worst disasters our society has endured. Xenophobia, homophobia, racism, sexism, ageism and other -isms make the headlines with alarming frequency. Not to mention the way we treat other species with which we share the planet. We slaughter billions of animals around the world every year for food, clothing, scientific research, and other purposes. Before they are slaughtered, many of these animals live in conditions that we would consider cruel if they were humans. Although insufficient and subject to constant revision, the available scientific evidence suggests that animals are sentient beings, capable of suffering and feeling pain, which for some should be reason enough to reconsider the way we treat them. Only a few decades ago, concern for animals and animal welfare was considered a frivolous matter without any sort of practical consequence. Today, the situation is very different. Animal welfare is becoming an increasingly important issue. It is the basis for debates, conferences and university courses, and even for changes in legislation with important implications at various levels. The new animal welfare law recently passed in Spain is a perfect example of the debate and controversy surrounding this issue.