The exposition of the ideas of the thinkers presented here is quite well done. However, in terms of historiography the book is exactly what you'd expect from a white dude from the 1940s: a history of lots and lots of other white men. As is custom for this type of historiography, right at the beginning he kicks India and China out of the equation, in order to then proceed to pull off the usual: Presocratics, Aristole, Plato etc., some Roman stuff, Medieval (Aquinas, Scotus), Modern then Descartes, Kant, Hegel, Husserl aaaand it's done. Yeah, so that was apparently philosophy for the past 2500 years. The ideas of some 20 people. A boring historiography with complete disregard for collectives, for writings on the margin, for the influence of media and culture etc.
The defs of philo at the beginning are alright. Nothing unusual here; ofc philo begins with wonder, as Aristotle pointed out and so forth and so forth. Here, philo is truly an ever-reproducing, expansive, ultimately imperial, endeavor.