What is mandate of heaven definition?

The Mandate of Heaven is a concept in Chinese philosophy and religion that justifies the rule of emperors and kings in ancient China. The Mandate of Heaven refers to the idea that a ruler holds power and authority as long as they are just and wise, and if a ruler loses the support of the people because of their incompetence or unjust actions, they lose the Mandate of Heaven and can be overthrown. This concept was used to justify the overthrow of dynasties and the transfer of power from one dynasty to another. It was also believed that natural disasters, famine, and unrest were the signs that a ruler had lost the Mandate of Heaven and that a new ruler was needed. The Mandate of Heaven was an important concept in China's political and social organization for thousands of years and still holds relevance in modern Chinese culture.