DESERET NEWS publishes a sermon by Brigham Young: "Monogamy, or restrictions by law to one wife, is no part of the economy of heaven among men. Such a system was commenced by the founders of the Roman empire....Rome became the mistress of the world, and introduced this order of monogamy wherever her sway was acknowledged. Thus this monogamic order of marriage, so esteemed by modern Christians as a holy sacrament and divine institution, is nothing but a system established by a set of robbers.... -Why do we believe in and practice polygamy? Because the Lord introduced it to his servants in a revelation given to Joseph Smith, and the Lord's servants have always practised it. 'And is that religion popular in heaven?' It is the only popular religion there,..."
[Source: On This Day in Mormon History, http://onthisdayinmormonhistory.blogspot.com]