I guess it’s because high-conviction ideologies outperform low-conviction ones, including nationalistic and political ideologies, and religions. Dennett’s Gold Army/Silver Army analogy explains how conviction can build loyatly and strength, but a similar thing is probably true for movement-builders. Also, conviction might make adherents feel better, and therefore simply be more attractive.
I guess it’s because high-conviction ideologies outperform low-conviction ones, including nationalistic and political ideologies, and religions. Dennett’s Gold Army/Silver Army analogy explains how conviction can build loyatly and strength, but a similar thing is probably true for movement-builders. Also, conviction might make adherents feel better, and therefore simply be more attractive.