Why did Mattis resign? To issue a wake-up call to the world

James Mattis just shattered the glass you only break in case of emergency.

The US secretary of defense resigned in protest over the president of the United States actively undermining “an international order that is most conducive to our security, prosperity and values”.

You don’t have to like Mattis or agree with his policies or sweep under the rug all of the times he didn’t resign when Donald Trump did something truly abhorrent. But it’s difficult not to respect that he just had the courage to do what no one else in the Trump administration has done – resign in protest and go public with his grave concerns about the danger that Trump poses to the country and the world.

This article was originally published in The Guardian.