In some ways, President Donald Trump's new national security adviser, H.R. McMaster, is a lot like the man he is replacing, Michael Flynn. Both rose to the rank of three-star generals in the Army. Their worldviews were formed during the war in Iraq.
At key points in their careers, the two generals were withering critics of the groupthink endemic to the strategic class. For Flynn this was a devastating paper he published in 2010 critiquing intelligence collection in Afghanistan. For McMaster this was his 1997 book on the failures of the military leadership to speak truth to power during the Vietnam War.