2 Quotes & Sayings By Wilhelm Johannsen

Wilhelm Johannsen was a Danish philosopher and biologist. He is best known for his work Philosophia Biologica, in which he argued that organisms are complex systems of organs and tissues rather than mechanical machines. In his later work he also argued that the self evolved from the union of body and soul. The work of Johannsen's student, August Weismann, was a major influence in the development of the modern evolutionary synthesis in the mid-20th century.