why has the order that was brought by by the congress of vienna restored peace for most of the following century while the order brought by by the agreements that followed WWI only lasted for miserable 15-20 years?

by NIRNIRNIR
poiuzttt

There were several wars just years after the Congress of Vienna. Where did you get the "following century" figure from?

[deleted]

same post from a year ago (no really great answers though) https://www.reddit.com/r/AskHistorians/comments/273k06/how_do_we_explain_the_long_peace_between_18151914/