The man took a seat, slid a blank postcard in front of him, plucked a pen from a jar and paused. There. That’s the moment that Rachel Weil lives for. The addressee chosen. The sentiment sorted out.

One woman might not be able to change the world. But maybe four -- or six or eight or a dozen -- can. These four women were meeting to talk about their hobbies, their passions, their collections, ...