In 2002, when I was writing my award-winning sixth book, Principled Profit: Marketing That Puts People First, a lot of the ideas in it were way out in front of the pack. Not a lot of people were talking about corporate environmental sustainability, and pretty much no one was talking about success through business ethics.

I spent a lot of time this weekend editing the manuscript for my eighth book, Guerrilla Marketing Goes Green (which will be published about a year from now by Wiley, and co-authored with the legendary Jay Conrad Levinson). And I was struck once again by how much these issues have moved into the general discourse. It’s so easy to find sources now! Everyone’s talking about sustainability, and business ethics has a lot more street cred than it used to.

Of course, no one ever really knows what takes a radical idea and pushes it to become a trend–but I like to think that my work, and particularly the Business Ethics Pledge campaign I started in 2004, has at least something to do with the shift. The whole idea of that campaign is to move the ideas through a small number of influencers and create a “tipping point” within society. We certainly haven’t reached the tipping point yet, but I think we might be seeing some of the early rumbles.