Two recent movies, Temple Grandin and Buck, depict the most inspirational real heroes I can recall. Temple Grandin and Buck Brannaman both pioneered ways to improve animal lives, by getting deep enough in animal heads to see how to avoid terrorizing them. Temple deals with cattle, Buck with horses. Terrorizing animals less also helps humans who deal with them.
1) Neither is a purist. Both accept that animals often suffer, and are slaves of humans. Both work within the current system to make animals lives better, even if the result falls short of their ideals. Compromising with bad is often essential to doing good.
2) Though are similarly insightful, Grandin has a far bigger impact, as her innovations are embodied in physical capital, e.g., the layout of large plants, chosen by large firms. She has revolutionized an industry. In contrast, Brannaman’s innovations are embodied in human capital chosen by small organizations. While Brannaman is personally impressive, it is far from clear how much practice people like him have really changed. Capital intensity does indeed promote innovation.
3) Many doubt that we should feel bad about animal suffering, because they doubt animal minds react like human minds to force, pain, etc. The impressive abilities of Grandin and Brannaman to predict animal behavior by imagining themselves in animal situations supports their claim that cattle and horse fear and suffering is recognizably similar to human fear and suffering. I tentatively accept that such animals are afraid and suffer in similar ways to humans, with similar types of emotions and feelings, even if they cannot think or talk as abstractly about their suffering.
4) The fact that animals are slaves does not imply that animal lives have no value, or that nothing can effect that value. Slavery need not be worse than death, and usually isn’t. A future where the vast majority of our descendants are slaves could still be a glorious future, even if not as glorious as a future where they are not slaves.