What does the Bible say about the unity of mankind?

In Acts 17:26, the Apostle Paul states that God made all nations from one blood, indicating that every human being shares a common ancestry. This profound truth highlights the equality of all people, transcending social, racial, and economic divides. It counters the notion of superiority based on race or class and reinforces the idea that every person has the same origin from Adam and Eve. This unity is essential for Christians, as it establishes the foundation for brotherly love and mutual respect among all of humanity.