As I recall, humans have left a bit of the line of biological evolution that is natural to other species, now taking a "second nature" that allows us to some extent control or affect our evolution.

Either by the development of new medical or health techniques, to allow people who did not survive before to live and leave offspring, or by the development of new ways of killing, thereby eliminating a number of people who in conditions Natural would have survived enough to leave offspring and that their genetic heritage was not lost.

Thus, that human evolution already has time that is being altered by the actions of humanity. This may be more intense in the future, when it is possible to pre-program or genetically design the offspring.

Therefore, I believe that humanity has not been in the same line of natural evolution for a long time as the rest of the species.