Isabella

Isabella, Queen of Castile, joined her crown with Ferdinand’s in 1492, creating the dynastic foundation of a powerful Spanish monarchy. The book presents her reign as a formative stage in Spain’s absolutist development: the Crown consolidated authority, controlled colonial wealth and trade, and helped establish institutional arrangements that later contrasted with England’s more pluralistic trajectory.

The 1492 Union

Spain was forged in 1492 through the merger of Castile and Aragon by the marriage of Isabella and Ferdinand. That year also marked the end of the Reconquest, the long process of expelling Arab rule from the south of the Iberian Peninsula. Granada, the last Arab state there, fell as Christopher Columbus arrived in the Americas, claiming lands for Isabella and Ferdinand, who had financed his voyage. The coincidence brought together territorial consolidation at home and the opening of an immense imperial opportunity overseas.

The union of the crowns, followed by dynastic marriages and inheritances, expanded into a European superstate. Isabella died in 1504, and her daughter Joanna was crowned Queen of Castile. Joanna’s marriage to Philip of the House of Habsburg linked the Spanish succession to the Habsburg dynasty. Their son Charles was crowned ruler of Castile and Aragon in 1516; through inheritance he added the Netherlands, Franche-Comté, and Habsburg territories in Germany to the Iberian and American possessions, becoming Emperor Charles V in 1519. The book describes Charles as continuing the project of strengthening the absolutist state begun by Isabella and Ferdinand.

Consolidating Monarchical Power

The book situates Isabella’s reign within a broader effort to build and consolidate absolutism. The monarchy’s position was strengthened by American precious metals: silver discovered in Mexico from the 1520s and the conquest of Peru after 1532 brought wealth to the Crown through royal shares of conquest and mining proceeds. The great silver deposit at Potosí, discovered in the 1540s, further enlarged royal resources. This imperial wealth supported the monarchy, but it did not produce the broad-based commercial development that emerged in England.

The contrast lay partly in how opportunity was distributed. In England, colonial and trading opportunities were relatively open to a wider body of merchants, helping create a wealthy group with interests distinct from those of the Crown. In Spain, Isabella and Ferdinand organized colonial trade through a Seville merchants’ guild, which monopolized exchange and ensured that the monarchy received its share of the American wealth. Trade between colonies was also restricted: a merchant in New Spain, for example, could not trade directly with one in New Granada. These arrangements preserved the flow of precious metals to Spain but obstructed the emergence of a broad merchant class.

Expulsion and the Limits of Inclusion

The book also identifies the expulsion of Spain’s Jewish population as one of the monarchy’s earliest acts after the Reconquest. Approximately 200,000 Jews were given four months to leave. They had to sell their land and other assets at very low prices and were forbidden to take gold or silver out of the country. The account presents this as a human tragedy and as evidence of the exclusionary character of the political order taking shape under the Crown.

The consequences of this institutional path extended beyond Isabella’s lifetime. Spain’s monarchy grew more powerful, but colonial wealth and commercial privileges remained narrowly controlled rather than enabling a broad coalition of independent traders. In the book’s comparison with England, this distinction mattered: the English merchant class became a foundation of economic dynamism and an opponent of absolutism, while Spain’s monopolized system did not generate an equivalent constituency for institutional change. Isabella’s significance in this account therefore rests not only on the union of two crowns, but also on the early consolidation of a monarchy whose political and economic arrangements shaped Spain’s later divergence.