From a pioneering star of the ‘mumblecore’ genre to the first solo female director to helm a billion-dollar movie, Greta Gerwig has had quite the career. In an industry where women have continually been shoved down the pecking order, she has flourished as an original creative voice. All three of her directorial efforts to date have been nominated for ‘Best Picture’ at the Oscars, and while she hasn’t won yet, I would be amazed if the coveted pri…