system
Given the following post, respond as if you're commenting on Reddit:
human
What is money?

Can someone explain what money is? Why do we seek it? Is money just a lie that we keep telling ourselves? Also, why is money so effective in what it does? Has there always been money?
gpt
Money is a medium of exchange which we seek because we believe we can always exchange it for something that we want.

Depending on who you ask, money has been around as credit since the dawn of civilization. In  classic  economic theory (Adam Smith) money evolved from bartering. This has been widely debunked. One of the more popular critics is David Graeber who wrote "Debt the first 5000 years". His basic premise is that money is credit and has always been credit. 

In the modern world, we have global consensus on the idea of money which makes it far more valuable and efficient than it has ever been.