It is really funny to think about the sources of economics.
Someone thousands of years ago had to have been like, "I can do this for you, but you need to do this for me in return." The basis of an exchange. Some favors arguably cost more than others.
Then other people found shiny rocks and gems and said: These are incredibly precious materials. Therefore these are valuable and worth a lot of favors.
Then people took shiny rocks and gems, and different cast metals and said this is currency and this currency has a set value completely determined by the fact that everyone agrees on how much this is worth.
Overall, people talk about the value of the dollar, or the pound sterling, or the euro and all I can think about is: It is all a made up value. If people shifted value away from the dollar and started trading in goods rather than currency the spending power of currency would plummet and trade goods would greatly increase. Likewise if people did things for other people for free out of a commodity of spirit and friendliness than nothing would technically have a value in terms of economic consideration.
I guess this is one of the reasons why the science of economics just bothers me. Unlike mathematics which exists to help humans make reason out of the natural world i.e. provide a language for science, economics is just arbitrary concepts which have become entrenched in culture. How many other animal species I wonder actually have consideration for economics? Do other animal species barter and trade? Do other animal species place economic value on possessions?