Why are immigrants more competitive than aborigines?

What is "indigenous people" is still inconclusive internationally. It is generally believed that aborigines refer to people who have lived in a country or region for generations before the arrival of foreign races. Due to the invasion and cultural assimilation of outsiders, they are in a very unfavorable position, such as American Indians, Maori in Oceania and Inuit near the Arctic Circle. According to the estimation of relevant United Nations agencies, there are more than 5,000 indigenous groups in the world, distributed in more than 70 countries on five continents, with an indigenous population of 300 million. After European immigrants, many indigenous people lived in poverty because of long-term discrimination.