Sapiens - there's a section in there about how everything (well, most) in our world is essentially a figment of our collective imaginations that enough of us be

Sapiens - there's a section in there about how everything (well, most) in our world is essentially a figment of our collective imaginations that enough of us believe is true and as such it is reality. If enough people (like everybody) decided tomorrow that every company's articles of incorporation actually don't count then companies as we know them could simply cease to exist since the documents that make them exist only have meaning in our collective imaginations. Once I accepted this everything became a lot more fun, arguments about politics/religion etc are enjoyable as you realise that no one is fundamentally right. Also, the explanation of fractional reserve banking and how debt came to be a thing was like the matrix being revealed. Good book, highly recommend it.