jackelgull
An aberration of nature
The solutions these Congresses come up with did work, but they only addressed the political reality of the moment. The Berlin Congress for example, diffused tensions brought by colonialism for thirty or so years before it erupted into WW1. So it accomplished its job, but it only worked for the reality of the moment, not bringing any lasting peace. The UN on the other hand, is an organization hoping to do that, no matter how flawed the premise that nations would set aside their interests for the good of mankind is.