There is neither Jew nor Greek, there is neither slave nor free, there is no male and female, for you are all one in Christ Jesus. (Gal. 3:28)
Now before faith came, we were held captive under the law, imprisoned until the coming faith would be revealed. So then, the law was our guardian until Christ came, in order that we might be justified by faith. But now that faith has come, we are no longer under a guardian, for in Christ Jesus you are all sons of God, through faith. For as many of you as were baptized into Christ have put on Christ. There is neither Jew nor Greek, there is neither slave nor free, there is no male and female, for you are all one in Christ Jesus. And if you are Christ's, then you are Abraham's offspring, heirs according to promise. (Gal. 3: 23-29)
Gal. 3:28 is indeed a precious verse when understood correctly. Misinterpreted, however, and it becomes a tool for devastating the Faith, as has happened in the hands of the feminists and their egalitarian allies.
Gal. 3:28 is located in a discourse in Galatians on the topic of salvation. More specifically, the topic is with regards to the historical unfolding of the Gospel of promise which bring an end to the former era of Law (capital 'L') in redemptive history. In Paul's view, the era of the Law placed the people of God under bondage which is necessary to create the ground for the Gospel to take root, the Law functioning as our pedagogue (v. 24) to lead us to Christ through our being justified by faith.
It is in light of the dawning of the Gospel promise that the Apostle Paul make this amazing statement in Gal. 3:28. Traditional Jewish culture tends to look down to women, yet Paul here makes the clam that men and women are alike as to salvation (which is the immediate context). Through the use of merisms, Paul states that all of humanity is encompassed in God's plan of salvation through the promise of the Gospel. Gal. 3:28 therefore functions to proclaim the universality of the Gospel promise unto any and everyone who believes and are thus made one in Christ.
As it has been seen, this verse has to do with the equality of all people in salvation. The feminists and their egalitarian allies, in their attempt to wrest this verse to promote the abolishments of any differences in roles between men and women are thus reading a concept alien to the context (and alien to Scripture too) into the verse. The feminist and egalitarian misuse of this verse to promote their errant theory is thus wrong.