Lessons to be learned from Sefton Delmer's anti Nazi propanganda in WW2

> Who is supposed to learn these lessons, and how should they employ what they learn?

Ask not what your country can do for you, ask what you can do for your country. Anyone can start a telegram channel and engage Russian soldiers based on these principles. Imagine how unbelievably low the barrier to entry has gotten, compared to having to print leaflets or run a radio station.