Clash of Civilizations is exactly what happened back in 1519 when the Spanish Conquistadors butted heads with the Aztecs of Tenochtitlan, who were known as the Mexica. These newcomers were welcomed at first by the rulers of the Mexica, because they did not know what to make of them. Not only did they arrive with beasts large and small (war horses and mastiff hounds) but they had weapons and armor that could only have been crafted by gods.
The Mexica tried to impress the Spanish with the wonders of their empire. What the Spanish saw was plenty of gold, silver and precious stones there for the taking. Once the Mexica saw them for what they were, the fighting went on for two years with the fortunes of war seesawing back and forth between the antagonists. Both sides made blunders which their opponents were quick to capitalize on. In the end it was the Spanish who prevailed.
In my opinion the author gives too much of the credit for the Spanish victory to the Small Pox that ran rampant through the Mexica nation while downplaying the role of Cortes and his soldiers. For this reason I was only going to give it a 4 star rating. While it is true that the amount of armored Conquistadores were never over a thousand and often less than a hundred in the field, they still beat thousands upon thousands of those they were trying to conquer.
Now if the author wants to give credit where credit is due, then he should lay it with the indigenous populations that had a deep seated hatred for the Mexica and flocked to join Cortes in what they thought was a war of liberation from the Mexica yoke. Besides supplying Cortes with human porters to carry their supplies, in a land without beast of burden or the wheel, they supplied legions of warriors to offset the overwhelming numbers of Mexica that could have swamped the Spaniards. For instance, in one part of the text the author mentions the three divisions investing the Mexica capital by land. "Cortes sent Alvarado to Tacuba with 30 horsemen, 150 Spanish infantrymen, 18 crossbowmen and harquebusiers, and 50,000 indigenous warriors from …" And that was just one column.
Plenty of relevant illustrations are provided. There is a picture of a replica macuahuitl, the Aztec sword which was made of wood embedded with serrated obsidian that had been flaked to razor sharpness. These could be deadly but useless against steel armor. By comparison the quick thrust of Toledo steel blades ran through many a Mexica warrior who was more interested in capturing an enemy for sacrifice than killing him. Many of the period Spanish weapons and armor were photographed in museums.
This is the reason for my 5 star rating. On closing the author made drew a interesting comparison by way of to aliens coming to earth. Would we unite against the invaders, or turn on each other? When the Mexica capital fell there may have been as many as 200,000 Mexica men, women, and children butchered by their ancient enemies in a blood frenzy which the Spanish were unable to stay. If the North Koreans invaded the US today would the Trump haters turn on their own people in a similar manner?