A friend asked for a three sentence summary of the book, and this is what I came up with:
America’s greatest days are yet to come. Just as the world of family farms and small businesses, America 1.0, gave way to the industrialized world of big cities, big business, big labor unions and big government, America 2.0, we are now moving into a new world of immense productivity, rapid technological progress, greater scope for individual and family-scale autonomy, and a leaner and strictly limited government. The cultural roots of the American people go back at least fifteen centuries, and make us individualistic, enterprising, and liberty-loving, equipping us to prosper in the upcoming America 3.0.
There is a lot more to it, of course.