Practical ethics should be all about really having an impact on the world. This requires, among other things, working on the topic regarding which we are expected to produce the most good. Plausibly, these are topics that have been traditionally neglected or at least that remain under-researched. These are also moral issues that may seriously affect a great number of individuals.
This year marks the 40th anniversary of the publication of Animal Liberation, in 1975. With it Australian philosopher Peter Singer initiated one of the highest impact careers in philosophy of the last century. It is not surprising that in 2005, Time magazine included him among the list of the 100 most influential people. It is remarkable, though, that the growing respect for Peter Singer has not been accompanied by a similar change of attitude regarding animal ethics —precisely the field in which he is recognised to have made a greater difference.
Animal Liberation boosted the contemporary academic debate on animal ethics and inspired the work of many other philosophers. This book contributed significantly to the growth of the movement for the equal consideration of nonhuman animals. It has influenced countless individuals to adopt veganism and to become activists in defence of animals. Even though the end of speciesist attitudes lies in the far future, very few other moral aims can produce a similar or greater good. Given the importance of the book, it is worth reviewing, on occasion of its anniversary, the position that Singer defended in it as well as some of the controversies it raises and issues it leaves open.
The views, opinions and positions expressed by these authors and blogs are theirs and do not necessarily represent that of the Bioethics Research Library and Kennedy Institute of Ethics or Georgetown University.