The prayer asks Mary to "Reign over individuals and over families, as well as over societies and nations."
In the Catholic Church, it is believed that Mary is the “Queen Mother,” following an ancient Jewish tradition that the mother of the king is known as the “queen.”
Since Jesus is recognized as the King of kings, the Virgin Mary is in turn the Queen, who can plead our case before her Son.
Here is a prayer composed by Pope Pius XII to Mary, Queen of Heaven.
From the depths of this vale of tears where sorrowing humanity makes weary progress — through the surges of the this sea of ours endlessly buffeted by the winds of passion — we raise our eyes to you, O most beloved Mother Mary, to be comforted by the contemplation of your glory and to hail you as Queen of heaven and earth, Queen of mankind.
With legitimate filial pride, we wish to exalt your queenship and to recognize it as due to the sovereign excellence of your whole being, O dearest one, truly mother of him who is King by right, by inheritance and by conquest.
Reign, O Mother and Queen, by showing us the path of holiness and by guiding and assisting us that we may never stray from it.
In the heights of heaven you exercise your primacy over the choirs of angels who acclaim you as their sovereign, and over the legions of saints who delight in beholding your dazzling beauty. So, too, reign over the entire human race, above all by opening the path of faith to those who do not yet know your Divine Son.
Reign over the Church, which acknowledges and extols your gentle dominion and has recourse to you as a safe refuge amid the calamities of our day. Reign especially over that part of the Church which is persecuted and oppressed; give it strength to bear adversity, constancy never to yield under unjust compulsion, light to avoid falling into the snares of the enemy, firmness to resist overt attack, and at every moment unwavering faithfulness to your kingdom.
Reign over men’s minds, that they may seek only what is true; over their wills, that they may follow solely what is good; over their hearts, that they may love nothing but what you yourself love.
Reign over individuals and over families, as well as over societies and nations; over the assemblies of the powerful, the counsels of the wise, as over the simple aspirations of the humble.
Reign in the streets and in the squares, in the cities and the villages, in the valleys and in the mountains, in the air, on land and on the sea; and hear the pious prayers of all those who recognize that yours is a reign of mercy, in which every petition is heard, every sorrow comforted, every misfortune relieved, every infirmity healed, and in which, at a gesture from your gentle hands, from death itself there arises smiling life.
Obtain for us that all who now in every corner of the world acclaim and hail you Queen and Lady may one day in heaven enjoy the fullness of your kingdom in the vision of your Divine Son, who with the Father and the Holy Spirit, live and reign forever and ever. Amen.