These six neighborhoods — affluent, poor, urban, rural — couldn’t be more different. But they do have one thing in common: a can-do desire to make life better on the block.

When something goes bump in the night, I leap into action. I do not cower. I’m filled with an abundance of adrenaline that I’ve been trying to free myself of for decades.

So, who knows. Perhaps the great historic conflict defining humanity in the 21st century won’t be over global economic inequality or the soggy shakeout from climate change or privacy in an era of the commercial-military digital surveillance Googleplex