Should we fear Vladimir Putin?

Do we need to fear a third world war when the master of the Kremlin relaunches the nuclear arms race with missiles that could vitrify France or Texas? Between him and us, between Russia and the West, there are many points of friction: Syria, Crimea, Ukraine. In power for 17 years, 3 times elected, is Vladimir Vladimirovich Putin this new tsar, ready to do anything to restore Russia's greatness, somewhere between Peter the Great and Joseph Stalin?