August Weismann
German evolutionary biologist
- Lived
- 1834–1914
Updated September 2026
Free to read
All free classicsThe Evolution Theory, Vol. 1 of 2
Essays Upon Heredity and Kindred Biological Problems
Studies in the Theory of Descent (Volumes 1 and 2)
The Evolution Theory, Vol. 2 of 2
Studies in the Theory of Descent, Volume I
Studies in the Theory of Descent, Volume II
On Germinal Selection as a Source of Definite Variation
About August Weismann
August Friedrich Leopold Weismann was a German evolutionary biologist. Fellow German Ernst Mayr ranked him as the second most notable evolutionary theorist of the 19th century, after Charles Darwin. Weismann became the Director of the Zoological Institute and the first Professor of Zoology at Freiburg.
Biography from Wikipedia, CC BY-SA 4.0. Photo via Wikimedia Commons.
Sources: book lists and dates from Wikidata and Open Library, ratings from Open Library readers, free texts from Project Gutenberg. Last updated September 2026.