The Origin of Species (Ch. VIII, Instinct), by Charles Darwin

<p>Ants have slaves who work for them. These slaves make the nests, feed the master ants, tend the eggs, and do the moving when a colony of ants migrate. Darwin minutely describes the habits and lives of the industrious ants and their marvelous social organization --- a wonder to mankind. (Volume 11, Harvard Classics)</p> <p> </p>