The Ohlone people lived on the land in the San Francisco Bay Area for over 2,500 years, carefully managing plant and animal resources. They established a balance with the natural environment by techniques like controlled burning that allowed native plants to thrive. However, their ancestral lands and way of life were disrupted by the arrival of Spanish missions, Mexican ranchos, and American settlers in the 1800s. Today, Ohlone descendants are working to revive their cultural heritage by documenting traditional plant uses and languages.