Given a choice of histories that normalise dystopia
I would take eugenics over slavery every time.
Through an overwhelming inequality
both ideas have generated a lot of suffering.
Where governments have found the resolve
to prove both ideas immoral they have both
been legislated out of sight but not out of existence.
Neither idea is totally gone. Slavery is as old as property,
and is as self regenerating as property rights too.
It has been part of the human economy since the end
of hunter/gatherer societies, over 8000 years ago.
Eugenics is a now discredited science,
destroyed by its links to the Nazi Party
and their scapegoating of jews, gypsies, homosexuals,
communists, Jehovahs witnesses, and others.
As a failed theory I like it because it was proved
to be spectacularly flawed and rigged science.
Since 1948 anyone who has tried to re-start
the science of superiority has been laughed out of their laboratory.
Hubris has had to revise slavery, to create new inequalities behind which to hide.