What six stages did the development of management theory go through in the 20th century?

The development of management theory in the 20th century has gone through six stages:

1 and 19 the traditional management stage from the end of the 20th century.

2. The scientific management stage in the 1920s and 1930s (the formation of classical management theory).

3. The development stage of the jungle of behavioral science theory and management theory in 1930s and 1960s.

4. The development stage of enterprise organization theory with strategic management as the core in 1930s and 1960s.

5. The theoretical stage of enterprise reengineering and corporate culture management from 1980s to early 1990s.

6. The theoretical stage of organizational management in the post-1990s era of globalization and knowledge economy.