> Many libraries in the US come from the hypercapitalist era of robber barons. They predate the word "capitalism". They predate the idea that there could even exist something other than capitalism.

It is very, very easy to check that this isn't true.

Capitalism was described and critiqued as such since the mid-1800s. The Communist Manifesto, published in 1848, is certainly no older than "the idea that there could even exist something other than capitalism".

Very few public libraries in the US are older than this, and the era of 'robber barons' took place after this (1860 or 1870 to 1900 or 1910).