Almeida, Mara, and Rui Diogo. "Human enhancement: Genetic engineering and evolution." Evolution, Medicine, and Public Health, 2019, pp. 183-189.This Commentary explores genetic enhancement in an evolutionary context. We highlight the multiple effects associated with germline heritable genetic intervention, the need to consider the unit of impact to human populations and their natural environment, and propose that a practicable distinction between 'therapy' and 'enhancement' is needed.