Modifications to Darwinian Theory

Time
Modification
Person
 
Early 1900's
Mendel's works "rediscovered"; blending inheritance rejected
de Vries, Morgan
1915-1929
"Continental Drift"
Wegner
1918-1933
Population genetics- evolution considered a change in allele frequencies
Fisher, Haldane, Wright
1936-1947
"Evolutionary" or "Modern" Synthesis; population genetics + evolutionary theory + ecology
Dobzhansky,Mayr, Simpson, etc.
1951
"Jumping Genes"
McClintock
1953
DNA
Watson & Crick
1960's - present
Biochemistry & Molecular Biology; Computers
Various
1966 - present
Cladistics
Hennig  & others
1990's - present
Evo-Devo;Phyloinformatics
Various

Modified from: Mayr, E. 1991. One Long Argument: Charles Darwin and the Genesis of Modern Evolutionary Thought. Harvard Univ. Press.