Before you all get your panties in a twist, I know it’s technically not true.
You got it the wrong way around: If it’s consensus, no one questions it anymore so you don’t need a source. If you start to question commonly hold beliefs, you will have to unlearn the whole field of economics. Do you want that?
In order to reach a consensus like that, you have to have supporting evidence that it’s true. Otherwise that consensus should absolutely be challenged.
It happens in all kind of scientific fields that things that feel logical and common sense, are taken for granted. I think SciShow made a video about it but I can’t find it right now.
We’re talking about anthropology/history here. People spend their entire careers researching things like this and publishing papers on it.
To make a claim like this requires evidence. Historical records would exist that some person at some point gathered together and published a peer reviewed article on.
If no sources or peer reviewed articles exist on the topic other than a few blog posts, then it’s extremely likely it’s a pile of horse shit.
This entire quote is actually a perfect encapsulation of orthodox economics, said with absolutely no self awareness.
It’s the system I’ve lived with my entire life!! How could it be anything but correct?! I’m a smart guy, I’m sure I’d have noticed if something were amiss.