Upon the independence of Argentina, the newborn country had a large territory but was thinly populated, and its ethnic composition was largely the same from the colonial era that had lasted from 16th to early 19th centuries. In the mid-19th century, a large wave of immigration started to arrive due to newly established Constitutional policies that encouraged immigration, and due to issues in the Old World such as wars, poverty, hunger, social unrest and pursuit for opportunities or a better life in the New World.