I converted a friend too.
I agree that baby steps are best. This is a huge paradigm shift, and people come to such things slowly, incrementally, not the first time you talk to them about the concept. You're just planting the seed.
I had been talking to my friend about the hunter/gatherer concept for a while, but when he saw pictures of Mark he was immediately in. Now he is frustrated that his mother won't read the book he leaves conspicuously laying out.