Realistically speaking he is a second rate geopolitical thinker who loves to claim to be a realist. There are NO world-class geopolitical thinkers in the West today for reasons which I explained on many occasions: most "thinkers" do not grasp the nature of modern military power because they lack background for understanding all technological intricacies and ways escalation dominance affects the balance of power. Yes, there are very few people of the scale of Douglas MacGregor who get it, but these exceptions merely confirm the rule. The actual claim to "authority" in geopolitics by Mearsheimer has nothing to do with geopolitics (of what passes for it today in the West) per se but with his and Walt's famous work on Israeli Lobby in the US.
Moreover, Mearsheimer was unlucky enough to graduate West Point in 1970 at the height of the America's humiliation in Vietnam and then served in the USAF precisely through the very end of America's Vietnam debacle in 1975. In other words, he was privy only to the US Armed Forces' doctrinal confusion and the early start of third stage of technological development of warfare which would manifest itself only in 1980s and into 1990s. So, speaking plainly, he missed most of it and his pseudo-academic trope of "offensive realism" is nothing more than a euphemism for American exceptionalism based on ignorance of the outside world and, as a matter of fact, America's main geopolitical rival today, Russia. Here is his today's piece about escalation.
About it. Get this:
ST. LOUIS — The Biden administration's plan to sell four large, armable drones to Ukraine has been paused on the fear its sophisticated surveillance equipment might fall into enemy hands, according to two people familiar with the matter. The technical objection to the sale was raised during a deeper review by the Pentagon's Defense Technology Security Administration charged with keeping high value technology safe from enemy hands. Previously the plan, which has been circulating since March, had been approved by the White House, three people said. The plan to sell Ukraine four MQ-1C Gray Eagle drones that can be armed with Hellfire missiles for battlefield use against Russia was first reported by Reuters earlier in June. The objection to the export of the drones arose due to concerns the radar and surveillance equipment on the drones could create a security risk for the United States if it fell into Russian hands.
No, the concern about this "sensitive technology" falling into Russian hands" as a reason for snag is a complete malarkey, albeit I do not state that there are no such concerns, they do exist but they are not about "security" primarily.
So, in this case Colonel Douglas MacGregor, a man who actually, unlike Mearsheimer, not only lived through but fought within new technological paradigm, contradicts Merasheimer dramatically, being, indeed, a true realist and a competent military observer.
However, the effects of repeated strategic failures in Afghanistan, Iraq, Libya, and Syria are cumulative. In the 1980s, General Motors wanted to dictate the kind of automobiles Americans would buy, but American consumers had different ideas. That’s why G.M., which dominated the U.S. market for 77 years, lost its top spot to Toyota. Washington cannot dictate all outcomes, nor can Washington escape accountability for its profligate spending and having ruined American prosperity.
Succinct, and that is why I am on record that the United States loses its wars due to ignorance and a systemic flaw in its strategic thinking and R&D and procurement philosophy, that is why I stated a few years ago that the United States lost the arms race to Russia, because it failed to adapt to fast changing realities of modern combat.