Alex Komoroske has an interesting lens on power in The Sarumans and the Radagasts. He calls power, magic, in this metaphor. Sarumans wield magic by compounding belief - I’ve heard this method summarized as “Never underestimate a man who overestimates himself.” Radagasts’ magic comes from understanding systems and supporting the actors in those systems. Read the essay for more detail, but an interesting idea comes at the end of the essay. Most Radagasts are first Sarumans.