It's compulsory to vote in Australia.We are one of a handful of countries in the world that enforce this rule at election time, and the only English-speaking country that makes its citizens vote. Not only that, we embrace it. We celebrate compulsory voting with barbeques and cake stalls at polling stations, and election parties that spill over into Sunday morning. But how did this come to be: when and why was voting in Australia made compulsory? How has this affected our politics? And how else is the way we vote different from other democracies?