Why Your Coworker Fakes Being Nice

There's a reason you never see the Machiavellian coming until it's too late. It's a psychological tactic called opportunistic cooperation. A Machiavellian will act like the ultimate team player. They'll help you smile and collaborate, but only when they know the boss is watching, or when it directly benefits them.

The second the spotlight moves away, they hoard information, undermine your work and take the credit. They're not your friend, you're just a piece of their chessboard.