The key is the first sentence I suppose. But probably, all in, Dugin's book has been more influential, and here the influence is well-studied.[0]

[0] https://en.wikipedia.org/wiki/Foundations_of_Geopolitics

Also, some aims from the book have already been achieved (like 'The United Kingdom, merely described as an "extraterritorial floating base of the U.S.", should be cut off from the European Union.[9]').