Jonathan Haidt Explains How Social Media Drives Polarization | Amanpour and Company

In a time of heightened political tension, Jonathan Haidt has a good idea of what’s driving this polarized atmosphere around the world. He is a social psychologist who believes social media has transformed in recent years to become an “outrage machine,” spreading anger and toxicity. He sits down with Hari to discuss this difficult problem and what the possible solutions could be.

Donald Trump’s Staff Shake-Up Leaves Jim Mattis in a Key Role

New national-security partners, and conflicting viewpoints, will test the defense secretary

President Donald Trump has, to great fanfare, remade his national-security team in recent days. But the most intriguing and consequential member of that team isn’t one of the newcomers, but rather the one who has been there all along: Defense Secretary Jim Mattis.

Mr. Mattis is the most enigmatic member of the Trump team. He’s the Iran hard-liner who defends the nuclear deal with Iran. He’s the warrior who argues for using diplomacy to address North Korea’s nuclear threat. He’s the military man who argues against allowing trade disputes to disrupt ties to key allies.

And he’s the one senior official who has learned how to disagree with Mr. Trump privately without being publicly skewered by the president for doing so.

All those positions were easier for Mr. Mattis to sustain when he was joined at the hip with Secretary of State Rex Tillerson. But Mr. Tillerson is gone now, and the key question is whether Mr. Mattis can continue to do his thing when paired with new Secretary of State-to-be Mike Pompeo and national security adviser John Bolton, both of whom strike quite different tones on those key issues.

“I think he’s more important than ever,” says former Defense Secretary Chuck Hagel. The question, Mr. Hagel adds, is “how long Mattis can survive in that environment.…There’s an intersection of conflict coming here, and it’s been coming.”

..  the appearance of disconnects between the president and his team on key issues. Consider: Mr. Trump has said the war in Iraq that began in 2003 was one of the biggest strategic blunders in American history. Mr. Bolton has been one of its most vocal champions. Mr. Trump has repeatedly questioned whether Russia interfered in the 2016 presidential campaign. Mr. Pompeo, the current director of the Central Intelligence Agency, has embraced the intelligence community’s conclusion that Russia did so. Mr. Trump has scheduled a summit meeting with North Korean leader Kim Jong Un. Mr. Bolton, the former American ambassador to the United Nations, has made the case for launching a pre-emptive military strike against North Korea.

.. Which makes Mr. Mattis all the more important as a stabilizing force. He has survived the crosscurrents of Trump administration intrigues through a combination of bureaucratic savvy and careful management of internal splits. Trump advisers say he has mastered the art of convincing the president he agrees with his goals while also sometimes differing with him on how to reach them. He has kept his public profile low enough that he isn’t seen as a rival to the president for attention or glory, while quietly cultivating good relations with members of both parties in Congress.