KnowraNicholas SpykmanLinked fromLinked fromThe 6 pages that link to Nicholas Spykman, each with the reason it gives.All 6Related 4Compared with 2Halford MackinderCompared with: Spykman challenged the strategic priority Mackinder gave to the continental interior.Strategic depthCompared with: His Rimland theory challenged explanations that made continental depth the decisive geographic advantage.