What are the three major fields of human knowledge?

Related questions

1. What is knowledge simple words?
2. What are the 4 types of knowledge?
3. What is social knowledge?
4. What are the 3 types of knowledge?
5. How important is knowledge in life?
6. How do we define knowledge?
7. What is tacit knowledge?
8. What is personal knowledge?
9. What is new knowledge?
10. What are tacit skills?

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2. #functioning
3. #nature
4. #societies
5. #major
6. #about
7. #social
8. #growth
9. #distinguish
10. #study
11. #political
12. #economic
13. #cultural
14. #among
15. #terms
16. #three
17. #psychological
18. #knowledge
19. #scientific
20. #fields
21. #forces