Among the leading proponents of conservatism in the eighteenth century was Revolutions and National States in the Atlantic World Among the leading proponents of conservatism in the eighteenth century was a. Giuseppe Mazzini. b. John Stuart Mill. c. Edmund Burke. d. Simón Bolívar. e. Maximilien Robespierre. Answer: C Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+