ISTANBUL US Secretary of State Marco Rubio said Thursday that the “old world is gone,” arguing that rapid global shifts are compelling nations to reassess their positions in “a new geopolitical era.” “The world is changing very fast right in front of us. The old world is gone – frankly, the world that I grew up in – and we live in a new era in geopolitics,” Rubio told reporters ahead of the Munich Security Conference. He said the speed of transformation requires governments and allies to “