Which early American civilization carved colossal stone heads?

The Olmec civilization, which flourished in Mesoamerica from approximately 1400 to 400 BCE, is renowned for carving colossal stone heads. These monumental sculptures, some weighing several tons, represent rulers or important figures and are characterized by distinctive facial features. The Olmec are often considered one of the earliest complex societies in the Americas, laying the groundwork for subsequent cultures in the region.