Mayr followed up on Dobzhansky's work with the 1942 book Systematics and the Origin of Species, which emphasized the importance of allopatric speciation in the formation of new species.
Mayr menyusul hasil kerja Dobzhansky dengan buku tahun 1942 Systematics and the Origin of Species, yang berisi tentang pengaruh spesiasi alopatrik dalam formasi spesies baru.