The optimum lies all along that spectrum I think. So combined global/centralized, localized/coordinated and individual/decentralized preparedness would give you

The optimum lies all along that spectrum I think. So combined global/centralized, localized/coordinated and individual/decentralized preparedness would give you the highest level of resilience. Defense in depth, if you will. It's also the highest effort/cost, of course. I was thinking when the parent poster hinted at that - You see that broad-spectrum approach advocated and implemented by disaster preparedness agencies - A central coordination capability coupled with regional direct response capabilities, and strong appeals from them to citizens for individual/family-level preparedness.