Kamala Harris was sworn in today as the first woman Vice President of the United States. That means she's only a heartbeat away from occupying the Oval Office — and could well be the Democratic candidate to replace Joe Biden if the 78-year-old president decides to not run for reelection in 2024. Should Harris — or another woman — become US president in the future, that'll (finally) put America on par with most of the world's top 20 economies, which have already had a female head of state or government at some point in their democratic history. Here we take a look at which those nations are.
