Americans have been trained to fear the word "theocracy." Like Pavlov's dogs, they start drooling "Intolerance!" "Osama bin Ladin!" and "Loss of Civil Liberties!" whenever they hear the word "theocracy."
Perhaps we should forgive them for mistaking "theocracy" (government under God) for "ecclesiocracy" (government under clergy). We join many of America's Founding Fathers in being quite critical of the clergy. In fact, we would just as soon see the entire concept of "clergy" and "church" eliminated entirely. America's Founding Fathers gave us "Liberty Under God" because they separated their theocracy from any church.
Today's government refuses to be "under God" because it thinks it is god. The two major political parties of our day preach a doctrine called "statism": the worship of The State.
In 1892 the U.S. Supreme Court declared that America was a Christian nation. We would call it a "Christocracy." So would Thomas Jefferson's closest friend, Dr. Benjamin Rush. The original "American Dream" was that of every American dwelling safely under his own "Vine & Fig Tree."
The word "Gospel" means "Good News." The Good News is Christocracy. The Gospel is Christocracy: the world-wide reign of Christian Theocracy.
Most people believe "the Gospel" is "I get to go to heaven when I die." For every verse in the Bible that talks about going to heaven when you die, there are at least 100 verses that talk about Theocracy. Most of the Bible is about Theocracy.
"Theocracy" means "God governs." A "Theocracy" exists when society's institutions acknowledge God and His Commandments and put them into practice: families, schools, businesses, charities, media, courts, legislators, executives, banks, etc. God promises that when we obey His Commandments, he blesses the institutions of our society (and eliminates those, like the Mafia, that shouldn't exist at all).
This is the Gospel, the "good news." Galatians 3:8 says:
And the Scripture, foreseeing that God would justify the heathen through faith, preached beforethe Gospel unto Abraham, saying, "In thee shall all nations be blessed."