How has selective breeding been used on humans beings?

There is no scientific consensus on whether or not selective breeding has ever been used on humans beings. Some scholars argue that selective breeding was attempted in ancient societies such as Sparta, where citizens were encouraged to produce healthy, strong children, and those with disabilities or deformities were often killed or abandoned. However, there is no concrete evidence to support this claim.

In the modern era, there have been some instances of eugenic practices being implemented, such as the forced sterilisation of certain groups of people in the United States and Europe during the early 20th century. However, these practices were widely condemned and are no longer practiced.

There are ethical and legal concerns associated with selective breeding in humans, as it could lead to discrimination against certain groups of people. Additionally, there is the risk of unintended consequences, such as increased genetic susceptibility to certain diseases. For these reasons, selective breeding in humans is generally not considered to be ethical or desirable.