Weigan was the son of a surgeon and was born at
Waiblingen in 1677. He studied theology at
Württemberg but also took interest in anatomy and
natural science. In 1711, Weigen authored
De Jure Hominis in Creaturas. It has been described as "the first work ever to deal with the topic of animal rights as a general theme." The book became known in Denmark and inspired
Laurids Smith. It was republished in 2008. Weigen moved to
Wahlheim, where he died in 1727. ==Selected publications==