According to Wikipedia:
Eugenics is a set of beliefs and practices that aims at improving the genetic quality of a human population.
And from this site (also Wikipedia):
In 1907, Indiana passed the first eugenics-based compulsory sterilization law in the world. Thirty U.S. states would soon follow their lead.(...) Some states sterilized "imbeciles" for much of the 20th century. Although compulsory sterilization is now considered an abuse of human rights, Buck v. Bell was never overturned, and Virginia did not repeal its sterilization law until 1974
Are there countries legally practizing this kind of things in the present as part of some ideologies/politics?