Our nature is hierarchical. God is in Himself a community of persons, but also a hierarchy. The Son proceeds from the Father, and the Holy Spirit proceeds from the Father and the Son.

Within ourselves, we are created in God's image, and thus there is a hierarchy within our own souls. The intellect rules over the will, and both govern the passions.

Families, likewise, are in the image of the Trinity. A man leads his wife, and both parents together raise and govern their children.

To deny hierarchy is to deny our nature. We can discuss at length what kind of human hierarchy is just, but it is the error of liberalism to assume that hierarchy is not necessary.