Christianity in Europe has been historically the biggest source of social hierarchy, supporting the divine right of Kings, the notion of deference to the priesthood, and the priesthood's subservience to the Pope (or, in Eastern Europe, the Patriarch).
Even after the Reform, Christianity encouraged tight family groups, the wife's subservience to her husband, and similarly children's subservience to their father.
Equality only exists in Christian texts, it is not part of any common practice.
If you want to look for a historical source about modern ideas of equality between people that inspired the Enlightenment movement, then that source are the Iroquois (or Haudenosaunee), whose society didn't have the same type of rigid hierarchies that all European societies at the time had.
Even after the Reform, Christianity encouraged tight family groups, the wife's subservience to her husband, and similarly children's subservience to their father.
Equality only exists in Christian texts, it is not part of any common practice.
If you want to look for a historical source about modern ideas of equality between people that inspired the Enlightenment movement, then that source are the Iroquois (or Haudenosaunee), whose society didn't have the same type of rigid hierarchies that all European societies at the time had.