Thanks to the unspeakable atrocities of Hitler and the Nazis, eugenics lost momentum in after World War II, although forced sterilizations still happened. But as medical technology advanced, a new form of eugenics came on the scene.

Modern eugenics, better known as human genetic engineering, changes or removes genes to prevent disease, cure disease or improve your body in some significant way. The potential health benefits of human gene therapy are staggering since many devastating or life-threatening illnesses could be cured.

But modern genetic engineering also comes with a potential cost. As technology advances, people could routinely weed-out what they consider undesirable traits in their offspring. Genetic testing already allows parents to identify some diseases in their child in utero which may cause them to terminate the pregnancy.

This is controversial since what exactly constitutes negative traits is open to interpretation, and many people feel that all humans have the right to be born regardless of disease, or that the laws of nature shouldnt be tampered with.

Much of Americas historical eugenics efforts such as forced sterilizations have gone unpunished, although some states offered reparations to victims or their survivors. For the most part, though, its a largely unknown stain on Americas history. And no amount of money can ever repair the devastation of Hitlers eugenics programs.

As scientists embark on a new eugenics frontier, past failings can serve as a warning to approach modern genetic research with care and compassion.

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Eugenics - Facts & Summary - HISTORY.com