what were the primary social divisions paul was challenging in 1st century galatia?

Galatians 3:28

“There is neither Jew nor Greek, there is neither slave nor free man, there is neither male nor female; for you are all one in Christ Jesus.”

Paul wrote this letter to Christian communities in the Roman province of Galatia (modern-day Turkey), likely in the mid-first century CE. He was addressing a critical challenge to his teaching: some were arguing that non-Jewish believers needed to adopt Jewish customs, like circumcision, to be fully part of God's people.

What divisions, unspoken or overt, do we tend to accept as natural within our communities today?