President Donald Trump’s closest advisor has an intuitive grasp of the hard realities of global power politics.

Once again, realism is in vogue. Apparently the White House is quite fond of the Peloponnesian War and wants to use it as a guidepost for contemporary foreign-policy challenges. If this feels like ...

I’ve spent much of my professional life building systems in finance, agriculture, logistics, and insurance, where outcomes depend just as much on strategy as they do on leverage. Over time, I realised ...