@Chabert
Seriously, who would purposely ask to be reduced to slavery
1.3 billion people on planet earth are deliberately slaves. They bow down 5 times a day to their master and do everything they possibly can to support his cause/make his wish reality.
Some even have the word slave as part of their names.
So, it's not strange that people would become slaves of their own will, because freedom and human rights are aspects of a highly civilized society & culture with a high average IQ (above 100), mainly white European peoples, with East Asian peoples being the only exception outside of the Whites who generally have adopted this concept because it has more benefits for their high IQ society.
Jews are also high IQ people, but they have given up most of their culture and society to blend into European societies.
To sum it up: The concept of a slave is only negative for the high IQ Westernized human, because it inhibits his freedom and potential.
Without Western civilization, there is no negative concept of slave, usually slaves would be part of the spoils of war and either be freed by ransom payment via their kin, or sold to someone else who could make use of the physical labour the slave can perform.
One day, you win the war and sell slaves for a profit, and another day you lose and will be sold instead.
It's a legitimate way to "gamble" before gambling was invented for low IQ populations, either you win and benefit or lose and have nothing left, it's as insane as it is enticing for those types of people, because in general, low IQ people do not tend to thrive, especially not in an inhibitory society that punishes crimes harshly, so the risk is generally overlooked by the prospect of booty, especially women, as these low IQ peoples are also more prone to spontaneous decisions/behaviour and and highly driven by their testosterone.
All in all, slavery is not a concept that is negative per se, it is perceived as such by the educated, enlightened Western mindset, because we think of our values more highly than our lives, as we perceive them as pillars of our culture, tradition and identity, in contrast to most other peoples.
For people who live without a clear thought about tomorrow, who sometimes don't even have the ability to perceive abstract concepts like morals, they don't really care about slavery at all, because they do neither comprehend that as long as there are slaves, there is the possibility that they might become one in the future,too, nor do they think about what that might result in for themselves, should they ever find themselves in that situation.