President Joe Biden’s administration represents a fresh start for the U.S. in foreign affairs. But as experts observed at an online MIT panel on Wednesday, the U.S. cannot just reset foreign policy to the last time Biden worked in the White House, as vice-president in the Obama administration. Too many things have changed, too dramatically, in the last four years. “You can’t rewind the clock at a time when, frankly, great power rivalry is higher than it ever was,” said Shivshankar Menon, an Indian diplomat who previously served as the…