Darwinism and Neo-Darwinism

the Darwinian position on each issue has been continuously under pressure from non-Darwinian evolutionary biologists from Darwin’s death to the present. 

https://www.lehigh.edu/~mhb0/PhilBioPotentialReadings%2020Oct18/Sahotra_Sarkar,_Anya_PlutynskiDarwinismNeoDarwinism_A_Companion_to_th.pdf