From one another. Europe since the end of WWII has existed in two deeply artificial states - first, as a proxy battleground in a simmering conflict between two great powers, then, as a collective vassal to one great power. Both of these seem to have made Europeans forget how security works. If spending money on the military to gain increased influence is on the table, then everyone will need to engage in security competition to survive. This is what Europe is deathly afraid of, and why there are now talks, however absurd, about an EU Army. You have completely forgotten what it's like for France to be leery towards Germany, for England to view Spanish interests as a threat. But that's what most of European history has been. Having an outside power provide security removes the possibility of security competition among European powers, which allows them to invest in welfare services and other largesse which they have now become completely reliant on - not the mention the fifth column welfare leeches which have infested every European polity,
