[Freelance Warrior]

The works of Dennis H. Mahan is of purely historical interest in the XXI century, IMO.

The "heartland theory" of Sir Mackinder was proven false by Nazi Germany and the USSR. Both possesed Eastern Europe (the last for several decades) but no-one managed to get the remaining world.

[headsonpikes]

To describe a work as of "purely historical interest" is no criticism at all in my view.

The understanding of sea power and logistics is never outmoded. That some shallow readers, including the Nazis, who leaned far more on Haushofer than on the men cited, would draw unwarranted conclusions from their works is no criticism either.