There's no universal definition for the word freedom, according to American historian Timothy Snyder. He divides the word into two categories for people — the freedom "from" and the freedom "to" various things. In the U.S., Snyder calls oligarchs like Elon Musk and President Donald Trump "heroes of negative freedom,” focused on being against things. But the author of On Freedom says it's a trap, because once you’re against one thing, it builds into an endless loop of the next thing. True freedom, he says, is to thrive for the sake of our common future.