The Great unity (大同, py.: dàtóng) is a classical Chinese term found in classical Chinese philosophy which has been invoked many times in modern Chinese history. It refers to a utopian vision of the world in which everyone and everything is at peace. In Chinese Marxism it has been associated with the state of world communism.

The great unity is also often mentioned in the writings of Dr. Sun Yat-sen and is included in the lyrics of the"National Anthem of the Republic of China".

See also: Xiaokang