The ideas of economists and political philosophers， both when they are right and when they are wrong， are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men， who believe themselves to be quite exempt from any intellectual influence， are usually the slaves of some defunct economist.

动物福利不仅仅是伦理问题——它是好的科学和好的商业。

The world needs sustainable solutions, not just temporary fixes.

"A book is a mirror; if a monkey looks in, no philosopher looks out."