Vincenzo Cosenza is a new media strategist living in Italy who has over the years, designed some of the industry’s most comprehensive infographics on social media’s global footprint. Recently, he asked if I would write the foreword for his new book, Social Media ROI. And, as I’m a fan of his work, it was an easy decision. As usual however, I asked for permission to share it with you here and his publisher agreed. This is the only place where…