As Hillary Clinton makes a whirlwind round of appearances in her last days as secretary of state, one groundbreaking aspect of her work deserves a moment in the spotlight: In a bold departure with tradition, Clinton made the promotion of equality for gay people a core value of U.S. foreign policy. That is a transformative change, one that advances the cause of human rights around the world -- not just for gays and lesbians, but for everyone. The way governments treat their LGBT (lesbian, gay, bisexual and transgender) citizens can tell us much about their overall approach to human rights and democracy. Mistreatment of sexual minorities is a microcosm of greater repression. Take a look at the gruesome spectacle of young gay men executed by the government of Iran in the streets, for all to see. Or, look at the new anti-gay laws coming into effect in Russia's increasingly authoritarian regime. It is no accident that the growing repression of LGBT Russians coincides with a dramatic deterioration of political freedom and what the nonpartisan Freedom House called "the return of the iron fist in Russia."