José Antonio Urquiza

Urquiza had gone to the town of Apaseo el Grande to settle a land dispute. Apparently, Urquiza had a dispute with a farmer who had been working on his property. While waiting for a train on April 11, 1938, Urquiza was stabbed by the worker who was in an inebriated state. He was stabbed twice, once in the back and in the heart. In interviews with acquaintances, Urquiza was described as "not an exemplary landlord" and mistreated his laborers.

The council of The Base intended to establish a public organization to further the group's goals. A meeting among other division leaders was to be conducted in order to create the organization. At the request of Urquiza, the meeting was held in Guanajuato. This meeting would occur on 23 May 1937 with 137 in attendance, establishing the National Synarchist Union.

On June 12, 1937, Urquiza and José Trueba Olivares drafted the synarchist manifesto. The manifesto was criticized by Salvador Abascal for being very vague in its statement and goals of the organization. However, Urquiza's draft served as a basis for synarchism with Gonzalo Campos revising it later. Urquiza vehemently opposed that the UNS be a political party.

In September 1937, Urquiza travelled to Washington accompanied by his brother Carlos and Abascal. There they met with prominent American bishops including Ambrose Burke to discuss the future of the Synarchist movement and to ensure that the movement would not encounter any hindrance in the southern American dioceses.

Urquiza had been a part of a secret Catholic society and organization known as The Base or The Legion based in Guadalajara. Since at least 1934, he was leader of the Guanajuato division.

José Antonio Urquiza Septién (April 10, 1904 – April 11, 1938) was a Mexican integrist, wealthy landowner, and a key figure in developing Mexican synarchism. Along with many other radical Catholics, Urquiza co-founded the far-right National Synarchist Union (UNS). He had given a considerable amount of his fortune to the organization and heavily financed the group's early activities and growth.

Urquiza was born to a prominent and wealthy family of landowners in Queretaro City on April 10, 1904. His family lost a considerable amount of land during the Mexican Revolution.