If I was to summarize this book's message, it's that we've given up radical ideals for comfort and convenience. Act on your conscience. Demand the change in society by actually forcing it to change. It's hard to ignore that point. The problem I see is that by keeping a movement on the fringe, we delegitimize its mission and it's harder to encourage much-needed change in the greater population. People burn out, and other people don't pay attention. Crispin is of the opinion that watering down the message won't get us anywhere either.
So yeah, support local businesses, get involved with grassroots activism and put yourself out where it's uncomfortable. I'm on board with that, and it's something that people should hear. It's a quick read, but packed with opinion. Add this to discussions of capitalism, feminism, racism, and how Western society works.