Why was John Stuart Mill cautious about rapid extensions of voting rights?

John Stuart Mill’s caution regarding the rapid extension of voting rights was rooted in his concerns about the potential for the "tyranny of the majority," a concept he and Alexis de Tocqueville explored extensively.1

Mill feared that if the majority of the population—which he and his contemporaries often presumed to be poor and uneducated—were granted immediate and unchecked political power, they might use it to tyrannize over minorities and stifle individual liberty. Unlike his father, James Mill, who held a more doctrinaire faith in a literate electorate, John Stuart Mill believed that civilization relied on a small minority of creative, intellectual minds. He worried that complete democracy could lead to a more restrictive environment for independent thought and opinion, potentially causing society to become a "stagnant pool" rather than a progressive one.12

While he accepted democracy as inevitable and advocated for the inclusion of women in the electorate, he remained wary of rapid franchise expansion, fearing it could undermine the quality of progress and the essential free play of speculative intelligence.32