Other mechanisms are either false (such as Lamarckism, the inheritance of acquired characteristics) or inadequate (such as saltationism, change by sudden jumps).
Interest in Lamarckism has increased, as studies in the field of epigenetics have highlighted the possible inheritance of behavioral traits acquired by the previous generation.
It was this secondary mechanism of adaptation through the inheritance of acquired characteristics that would become known as Lamarckism and would influence discussions of evolution into the 20th century.