Complex sentence: Phrenologists laid stress on the modularity of mind and they were regarded as materialists and anti-religionists-they were wary of Christian beliefs and acted-in Edinburgh at least-as the midwives to evolutionary theory.
Split into simpler sentences: Phrenologists laid stress on the modularity of mind and they were regarded as materialists and anti-religionists-they were wary of Christian beliefs. With their distaste for supernatural explanations, the phrenologists acted-in Edinburgh at least-as the midwives to evolutionary theory.