Humans are a big part of Genetic Engineering. Genetic Engineering provides the ability to add or delete specific genes within a living cell nucleus. Scientists have long speculated that parents would someday be able to genetically engineer their children for appearance, physical and mental abilities, or other traits of choice. For most people, these predictions have seemed so far in the future, or so patently repugnant, that they didn't need to be taken very seriously. Gene modifications can have an impact solely on a single person, or on a person's children and all subsequent descendants. Scientists have confirmed that the first genetically altered humans have been born and are healthy. Up to 30 such children have been born, 15 of them as a result of one experimental program at a US laboratory. There have been a significant amount of genetic experiments on humans. The National Institutes of Health performed the first approved gene therapy on a four year old with a rare genetic disease. In this gene therapy procedure, doctors removed white blood cells in the body, and let them grow in the lab, while inserting the missing gene in them.

      Using these technologies may change the nature of human life and society. It could make the human biological identity and function unstable. It would put into play a uncontrollable set of social and political forces that would have an impact on our world.