How did Montesquieu become deputy president of the Parlement of Bordeaux?

Montesquieu did not attain the position of deputy president of the Parlement of Bordeaux through a competitive appointment or election. Instead, he inherited the office in 1716 upon the death of his uncle, Jean-Baptiste, baron de Montesquieu. Along with the title and the office, his uncle bequeathed to him his estates, including the barony of Montesquieu near Agen.1

This transfer was possible due to the system of venality of offices in France, which allowed positions within the parlements to be purchased or passed down as part of a family's patrimony. Upon inheriting the role at age 27, Montesquieu became financially and socially secure, allowing him to focus on his judicial duties, the study of Roman law, and his scientific interests. He eventually sold the office in 1726 to help reestablish his finances and facilitate his move to Paris.231