Michel Eyquem, Seigneur de Montaigne, was born in 1533, the son and heir of Pierre, Seigneur de Montaigne (two previous children dying soon after birth). He was brought up to speak Latin as his mother tongue and always retained a Latin turn of mind; though he knew Greek, he preferred to use translations. After studying law he eventually became counselor to the Parlement of Bordeaux. He married in 1565. In 1569 he published his French version of the Natural Theology of Raymond Sebond; his Apology is only partly a defense of Sebond and sets skeptical limits to human reasoning about God, man and nature. He retired in 1571 to his lands at Montaigne, devoting himself to reading and reflection and to composing his Essays (first version, 1580). He loathed the fanaticism and cruelties of the religious wars of the period, but sided with Catholic orthodoxy and legitimate monarchy. He was twice elected Mayor of Bordeaux (1581 and 1583), a post he held for four years. He died at Montaigne (1592) while preparing the final, and richest, edition of his Essays.
A copy of the fifth edition of the Essais with Montaigne's own "C" additions in his own hand exists, preserved at the Municipal Library of Bordeaux (known to editors as the "Bordeaux Copy").  This edition gives modern editors a text dramatically indicative of Montaigne's final intentions (as opposed to the multitude of Renaissance works for which no autograph exists). Analyzing the differences and additions between editions show how Montaigne's thoughts evolved over time. Remarkably, he does not seem to remove previous writings, even when they conflict with his newer views.