Seven years ago, Timothy Snyder wrote the best-selling book “On Tyranny.” His new book “On Freedom” is a rumination of what it truly means to be free, especially during a time when authoritarianism has been making strides around the world. “Being against things is just the beginning; you have to know what you’re for,” Snyder tells Ali Velshi. “Being angry is not the right first step. Being joyous is the right first step.” He adds, “We have to be rebels in our time and try to make the future better than the present. That’s what freedom is.”

Snyder joins MSNBC’s Ali Velshi to discuss former President Trump’s meeting with Ukrainian President Volodymyr Zelenskyy and Trump’s lie that he can negotiate a deal “that’s good for both sides” to end Vladimir Putin’s illegal war in Ukraine.