Obergefell v. Hodges is a landmark Supreme Court case decided in 2015 that legalized same-sex marriage nationwide in the United States. The ruling established that the right to marry is a fundamental liberty protected by the Constitution, thereby affirming that same-sex couples are entitled to the same legal recognition and rights as heterosexual couples. This case marked a significant step forward in the broader struggle for gender equality and women's rights, as it recognized the importance of marriage equality as part of the fight against discrimination.