Voltaire's thought about equality and freedom was the most enlightening thing in France at that time. He has a famous saying: Is the farmer's son born with a yoke around his neck, while the noble's son is born with spurs on his legs? For him, equality means opposing hierarchy and feudal privileges. He believes that all men are created equal. He said: "All people who enjoy various natural abilities are obviously equal; When they play various animal functions and use their rationality, they are equal. " However, he did not implement this principle of equality in social and political fields. His equality is mainly against feudal hierarchy, equality of opportunity and equality of personality.