What is fairly possible is that the tribes who practiced polygyny, thus miring themselves in sexual violence, the endless expelling of low status beta young males, rotting of the gene pool, sloth, and the increasing need for rigid control over the young girls.
As monogamy and with it nuclear fathering spread across the Western world, it brought with it diligence, self discipline, life long commitment to children, and attention to something besides sex.
The evidence is murky, but the case can be made that as nuclear monogamy spread across the world, slavery disappeared in 100 to 400 years.
Indeed, the entire polygamous world was engaged in various forms of slavery, and some of the polygamous world is still engaged in slavery in the 21st Century!
Did the nuclear family structure of monogamy help end slavery?
There are mountains of evidence that support this.