The Indian Self-Determination Act is a U.S. law enacted in 1975 that allows Native American tribes to have greater control over their own affairs. It enables tribes to negotiate contracts with the federal government to manage programs and services that affect their communities, promoting self-governance and reducing reliance on federal oversight. This act was a significant step in recognizing the rights of Indigenous peoples, as it aimed to empower tribes like the Navajo Nation and Cherokee Nation. By fostering self-determination, the law supports the preservation of tribal culture and the ability to make decisions that best serve their members.