Bismarck mainly introduced some rudimentary social security to decrease worker support for socialist parties, so it was a reaction to socialism (albeit not dire

Bismarck mainly introduced some rudimentary social security to decrease worker support for socialist parties, so it was a reaction to socialism (albeit not directly the USSR) from the start. However before WW2 it was very limited in all countries (and much smaller scale than for example what's currently available in the US) before the 40's and 50's.