Zeihan's work on geopolitical instability has been praised by some for its originality and insights. However, others have criticized his work for being too pessimistic and for overstating the risks of geopolitical instability.
Despite the criticism, Zeihan's work has been influential in shaping the debate on geopolitical instability. His work has helped to raise awareness of the risks of geopolitical instability and has led to a greater understanding of the challenges facing the global order.