Final answer:
Voltaire's theories and attitudes promoted freedom of speech and separation of church and state. He criticized the Catholic Church, the aristocracy, and the French monarchy. Montesquieu also emphasized the importance of separating powers in a government.
Step-by-step explanation:
Voltaire's theories and attitudes towards government and religion can be summarized as promoting freedom of speech and the separation of church and state. He was an outspoken critic of the Catholic Church, the aristocracy, and the French monarchy, and he advocated for religious toleration and the innate utility of reason. Voltaire's ideas were influential in challenging traditional doctrines and shaping the French Revolution. His contemporary, Montesquieu, also emphasized the importance of separating powers in a government as a means of keeping it in check.