Why has the evolution of man remained static over the years?

Answer 1

It is a mistake to say that human evolution has remained static. Many people think that evolution requires morphological change, or change in physical appearance is required. That is not really true. A significant amount of evolutionary change in organisms is physiological; mutations in genes coding for proteins can result in changes to protein function and the biochemical pathways they affect, which may not necessarily result in a morphological change that can be observed. Something to think about is how modern medicine may be affecting human evolution. Consider the genes responsible for Diabetes. Modern medicine, with its ability to grant diabetics longer and healthier lives (and more offspring), may be actually increasing the frequency of the genes for diabetes in the population. Since evolution is defined as genetic change within a population, this change in the frequency of diabetes genes can be looked at as human evolution in action today.