"Collaborative consumption" sounds a lot like "capitalism." There's a marketplace that facilitates the exchange of goods and services between self interested individuals. I have no problem with the concept as far as she took it, and I think it's lovely that people who want to rent out their cars or grow vegetables in another person's garden can do so. But I find the social engineering spin she put on the idea a little annoying, using trade as a means to encourage less driving, more recycling, and so on. I'd also like to learn more about how she proposes to change people's behavior on a massive scale under such a system.