Peru has a history that dates back over 10,000 years, with early cultures thriving in the Andean highlands. The Inca Empire was one of the largest and most sophisticated empires in the world until the Spanish conquest in 1532. Peru was then colonized by Spain and became an important source of gold and silver for the Spanish crown. Independence was achieved in the early 19th century after efforts led by Simon Bolivar and Jose de San Martin, though Peru struggled with political instability afterwards. Today, Peru has a population of almost 30 million inhabitants, with Spanish and Quechua as the dominant languages among its diverse ethnic groups.