Originally posted by mookiestic
....aka artificial selection. natural selection has to do with environmental factors that weed out phenotypes of a species not adaptable to that environment to the point where it makes a change in the gene pool of the species. modern medicine is not an environmental factor.
yes you are correct. medicine is not an environmental factor, however it prevents the weeding out of those phenotypes that are not adaptable, therefore preventing the change in the gene pool of the species.