Are Humans Still in the Middle of Evolution?

Yes, humans and every other form of life are still undergoing evolution. However, the changes are not as immediately visible to us, given that they generally occur over thousands of generations. This article explores different aspects of human evolution, including natural selection, forced evolution, and the impact of human choices on our genetic makeup.

Natural Selection and Human Evolution

The process of natural selection continues to shape human evolution. Three thousand years ago, there were genetically distinct groups of humans. For instance, groups such as black, white, Asian, Middle Eastern, and a few others were well defined. Today, these groups have mostly merged, resulting in a predominantly mixed genetic ancestry. This blending of genetic traits provides an example of natural selection through changes in breeding habits.

Forced Evolution vs. Natural Evolution

While natural evolution occurs through random genetic drift and selection pressures, forced evolution is the result of human intervention. One such example of forced evolution is the transformation of wolves into dogs. Wolves and dogs share the same species distinctions genetically (such as Chihuahuas and Rottweilers both being classified as Homo canis), but they were shaped through human-directed breeding over thousands of years. Similarly, human societies are progressing towards a more "ethnically neutral" population, marked by a primarily brownish hue due to the mixing of genetic backgrounds.

The End of Natural Evolution?

While natural evolution will never cease as long as Homo Sapiens and other species exist, the future of human evolution may diverge from the natural course. Once we possess a complete understanding of our DNA and the ability to edit it reliably and economically, natural evolution will likely come to an end. Instead, future changes to our bodies will be planned by humans for better or worse, driven by choices of mates, birth rates, and medical interventions.

The Role of Human Choices in Evolution

Human choices, such as pollution and the use of medicines, significantly impact the course of evolution. Pollution, in particular, has become a potent force driving evolution. For example, the increase in mercury levels in water bodies has led to changes in the genotypes of fish populations. Human choices can either enhance or disrupt the natural process of genetic change, leading to alterations in our species' genetic makeup.

Conclusion

In conclusion, evolution is an ongoing process that affects all forms of life, including humans. While human intervention will lead to significant changes in the near future, natural evolution will continue in its own unique way. Understanding the dynamics of human evolution is crucial for appreciating how our past and present impact our future as a species.