There was a time when Norman Spinrad was on the cutting edge of science fiction, one of the leaders of the so-called New Wave with such works as Bug Jack Barron and The Iron Dream. Alas, those days are decades in the past and a mellower Spinrad has moved on to rather straightforward historical novels. First, there was The Druid King dealing with Julius Caesar's conquest of the Gauls under Vercingetorix. In Mexica, he once again deals with the themes of culture clash and conquest, this time with the Spanish overthrow of Montezuma.
The narrator of this tale is Alvaro de Sevilla, the alias of Avram ibn Ezra, a Jew who has fled the Spanish Inquisition and adopted a Christian guise in Cuba. Word has come to the island of people occupying what would eventually be known as the American mainland; more important than the people is the gold they seem to have lots of. Alvaro is not greedy, but has a scholarly interest in learning of this alien civilization; he plays a part in getting his friend, Hernando Cortes to launch an expedition.
Though armed with better equipment, the Spanish contingent will find itself almost hopelessly outnumbered. Cortes, however, is a canny individual and is able to coerce tribe after tribe into alliances, typically while cramming Christianity down their throats. These outlying tribes are one thing; the larger Empire of the Mexica (the term Aztec is rarely used), led by Montezuma, is another story.
Of course, history tells who will eventually win this battle, but the tale of the defeat of the Mexica still is quite interesting. Alvaro is often little more than an observer, but at times, he plays a key advisory role to Cortes. This will eventually eat at him; as a Jew, he knows all about persecution, and he will regret his role in the savagery he had helped provoke. At the heart of the tale, however, are two characters: Cortes and Montezuma, and even literarily, Cortes is the dominating figure. The general viewpoint of Cortes nowadays is not favorable, and while Spinrad does offer a humanizing depth to Cortes, the Spaniard remains a villain, albeit a charming one.
At the beginning of my review, I said Spinrad had moved on from science fiction, but really that is not completely true. Mexica is in its own way a science fiction story that really happened: a first contact story and an alien invasion story. And even if Spinrad is not the edgy writer he once was, he still is a good writer. Mexica starts off slowly but picks up in the second half (when Montezuma finally appears). If you are only vaguely aware of this story and tend to view it in black-and-white terms (typically, Cortes the evil destroyer of Indian civilizations), Mexica will offer a deeper look at the tale.