The socially progressive and tolerant island nation of Iceland legalized the recognition of gay marriage on Friday. In a unanimous vote, Parliament approved the law, which changes the definition of marriage to include same-sex unions. Homosexuality does not generate much controversy in Iceland, where voters elected Jóhanna Sigurðardóttir, who is a lesbian, Prime Minister in 2009. Sigurðardóttir is the world’s first openly gay head of state.