Greta Gerwig’s ‘Barbie’ Dream Job

Gerwig brims with references and influences, many of which she marshaled to make the movie “authentically artificial,” with everything “fake, but really fake” — make-believe and yet tangible, tactile, like playing with an actual toy. She called Peter Weir, the director of “The Truman Show,” to ask how to “execute something that’s both artificial and…