First we hear that Goldman Sachs honchos “socialize” thorny issues (meaning “talk about them in person”). Now we learn that a new, buzzword-heavy social media platform is calling itself “Socialistic.” Next up, the proletariat? Havas Takes Majority Stake in Colleen DeCourcy’s Startup – Advertising Age CHICAGO (AdAge.com) — Ad agency holding company Havas has taken a majority stake in Socialistic, a new social-media shop helmed by Colleen DeCourcy, the former chief digital officer at Omnicom Group’s TBWA….