Potok has chapters on some people I was familiar with (through writings) and others not. Among them are Chai Feldblum, Mary Lou Breslin, Ted Henter (creator of JAWS software, Adrienne Asch, Rosemarie Garland Thomson, and others. There's lots of fascinating information, but not the simplistic suggestion that the rest of us could (or should) make equivalent contributions if only we tried hard enough. Potok, a blind painter, and most of his interviewees are too socially conscious for that. They recognize the deep-rooted nature of inequality inside and outside the United States, and that some people are making a difference.
Potok, like us all, is capable of saying things that are wrong (p. 219: "Most of the disabled {in the Third World} use wheelchairs") [Millions with brain damage from malnutrition, and millions with PTSD from natural and human-made disasters haven't had their disabilities diagnosed] and others that make sense, but it's unclear where the information is from (also p. 219: "90 percent of those who need {wheelchairs} don't have them.")
But the book is certain to bring important ideas to a general readership. Potok is brilliant in writing about disability as a component of diversity. His introspection and learning from his interviewees is evident. Readers will have the privilege of learning from his interviewees and from Potok. I know that I did.