Determining the "largest" lost civilization is a complex task, as there's no single, universally accepted metric for measuring size. We can consider factors like geographical extent, population, cultural influence, or technological advancement.
Here are some contenders for the title of largest lost civilization:
- The Indus Valley Civilization: This civilization, flourishing from 3300 to 1300 BCE, extended across a vast area encompassing modern-day Pakistan and northwest India. It boasted a sophisticated urban planning system, advanced sanitation, and a unique writing system. https://en.wikipedia.org/wiki/Indus_Valley_Civilization
- The Maya Civilization: Spanning over 2,000 years (2000 BCE to 900 CE), the Maya civilization flourished in Mesoamerica, covering parts of present-day Mexico, Guatemala, Belize, Honduras, and El Salvador. Known for their impressive architectural achievements, intricate calendar system, and advanced mathematics, the Maya civilization left behind a rich legacy. https://en.wikipedia.org/wiki/Maya_civilization
- The Olmec Civilization: Considered the "mother culture" of Mesoamerica, the Olmec civilization (1600 to 400 BCE) influenced many subsequent civilizations in the region. Their influence is evident in the art, architecture, and religious practices of later cultures. https://en.wikipedia.org/wiki/Olmec_civilization
Ultimately, the "largest" lost civilization depends on the criteria used for measurement. Each civilization mentioned above boasts unique characteristics and contributed significantly to the course of human history.