The work deals with Voltaire's method of writing history. It points out Voltaire's critique of earlier historical studies. Voltaire criticized them for narrow geographic and subject scope and tried to overcome these drawbacks in his own work. Methodologically he continued the 17th century criticism of sources and considered how to find the truth or at least verisimilitude in historical studies. The second part of the work focuses on Voltaire's critique of J. B. Bossuet, C. Montesquieu, J.-J. Rousseau and B. Pascal.