Animals' Rights Considered in Relation to Social Progress
Author: first_name: Henry
last_name: Salt
Language: English
Year: 1922

In the book, Salt argues against the idea of speciesism, though the term was not coined for another 76 years.
The book also argues against vivisection, misuse of horses and wild animals, hunting and fishing, and the fur trade, and in favor of vegetarianism.
It is widely considered to be the first explicit treatment of the concept of animal rights. - Summary by Angus Taylor and James Hyslop