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The world is on fire. Syria has fallen apart. Russia has seized Ukrainian land. And China is flexing its muscles. Who can put these fires out? As Anders Fogh Rasmussen, Denmark's former Prime Minister and NATO's former Secretary General explains, only the United States.

Do you know who Paul Revere is? He is one of America's key historical figures. Want to know what he did? Eric Metaxas, New York Times #1 bestselling author, shares the remarkable story.

Have you ever envied someone else's success? Do you sometimes wish you had another person's life? Well, comedian Tom Shillue explains why comparing yourself to other people will put you on the fast track to an unhappy life.

Dave Rubin of The Rubin Report used to be a big progressive. He even had a show with The Young Turks! But now he's not a progressive. He has left the left. Why? Dave Rubin shares his story.

What's holding the Arab world back? Why, by nearly every measure, are Muslim nations so far behind the West economically, culturally and scientifically? Bret Stephens, Global View columnist for the Wall Street Journal, explains.

Why is America the world's richest nation? Is it mostly because of the government, or is it thanks to entrepreneurs and businessmen? Historian Burt Folsom of Hillsdale College explains.

Can every child receive a good education? With school choice and competition, yes. The problem? Powerful teachers unions oppose school choice. Rebecca Friedrichs, a public school teacher who took her case against the teachers union all the way to the Supreme Court, explains why school choice is the right choice.Donate today to PragerU: http://l.prageru.com/SchoolChoiceNowTake the pledge for school choice! http://www.schoolchoicenow.com

The Paris Climate Agreement will cost at least $1 trillion per year, and climate activists say it will save the planet. The truth? It won't do anything for the planet, but it will make everyone poorer--except politicians and environmentalists. Bjorn Lomborg explains.

If you saw your dog and a stranger both drowning in the ocean, which would you save first? Your answer says, well, everything about how you see the world. Dennis Prager explains.

What would happen if there was just one tax rate for most Americans? Would that be fair? Could it even work? Steve Forbes, Chairman and Editor-in-Chief of Forbes Media, explains.

What makes a man sexy? What makes a man...a man? Is there something about being the "bad boy"? Or is it more about predictability and reliability? Jim Geraghty of National Review explains.

How do devout Muslims born in the West feel about Jews? How do they feel about Western values in general? Kasim Hafeez, who was raised a devout Muslim in England, explains.

Should Americans wish each other "Happy holidays" or "Merry Christmas"? Should an office "Christmas party" be called a "holiday party" so that it's more inclusive? Dennis Prager answers these questions and more in this short video.

If you're a parent, is your child getting enough Vitamin N? It may be the most important thing you can give them. But what exactly does Vitamin N do? Watch this video to find out.

Would stricter gun laws reduce gun violence? Could gun control measures in places like Australia work in America? Nicholas Johnson, professor of Law at Fordham University, explains.