Agree to disagree. The Bible states were all created in the image of God and we all stand equal before God.
I did state 1) the very early church, 2) the actual teachings (intent) of Jesus, and 3) that it was particularly focused on spiritual equality but that Jesus spoke of equity amongst all people.
Note that equity does not necessarily mean equality, especially in a legal or social power sense.
Secondly, Christianity became widespread because it was adopted by Rome. You can actually trace the spread along Roman roads. I’m talking about the beginning of the common era, or 2000 years ago; the spread started happening about 1500 years before Western colonialism and nearly 1000 before the crusades.
Don’t forget, Western civilization rose from the rubble of the Roman empire. Christianity was already in place and been heavily influenced by Roman culture, laws, and organization.
You mention what’s in the Bible, and you’re partially right. However, the Bible was not canonized until 537 CE, 300 years after the time period I’m talking about. There’s a reason why certain texts were included and others weren’t. The books that made it into the recognized Bible were NOT the only holy texts. You should check out some of the others that have survived.
The Christianity that Jesus desired was killed in its infancy by the allyship with the Roman state. It never really got off the ground. Most of the sects that pursued equality, like the gnostics, the copics, and the mystics were all brutally murdered in those first centuries.
Still, that desire to change and pursuit of equality as a part of spiritual ascension existed for a very brief moment. There’s not much left from that time, but from what there is it seems pretty clear. They tried to change everything.
There’s a line in a movie (Stigmata) that sums it all up very well. "We are all blind men in a cave, searching for a light that was extinguished two thousand years ago."