Isidore the Laborer built a career in business at a period when the rules of commerce were themselves changing.
The record lists Isidore the Laborer as Spanish farmer and saint.
Isidore the Laborer was born at Madrid in 1079. His recorded nationality is Kingdom of Castile.
Commerce then ran on personal credit, family networks and letters that took weeks to arrive; trust was the scarcest asset.
He worked as farmer and agricultural worker.
Enterprises outlive their founders or they do not, and that is the whole test.
That the business was built from Kingdom of Castile shaped it: capital, regulation and market size differ by country, and they decide what is even attemptable.
Isidore the Laborer died in 1130, aged 51. What remains is the enterprise and its consequences, which is the only durable measure of a commercial life.
