Where did money originally come from?

Related questions

1. What is the Keynesian model?
2. What makes the IS curve steeper?
3. How is money created?
4. What is the profit margin in petrol pump?
5. What shifts the MP curve?
6. What is MMT debit?
7. What cause is curve to shift?
8. What is MMT weight?
9. How much money is earned from a petrol pump in one month?
10. What unit is bigger than a ton?

Tags

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14. #values
15. #recycled
16. #became
17. #coins
18. #western
19. #could
20. #introduced
21. #their
22. #series
23. #because
24. #money