I remember, and you might too, feeling virtuous when my family took part in the California grape boycott in the 1970s. I was only a teenager, but to me it meant that I was standing in solidarity with farm workers. I felt a bond, although I’d never met a farm worker as far as I knew.

My small action, combined with the similar ethical choices of millions of others, helped farm workers position themselves to win. And what did they win? What they asked for were basic human rights: safer working conditions, less pesticide exposure, habitable housing and better wages.