What are the reasons for the weakness of the former colonies in Latin America, USA?

The economy of the former colonies was too weak, which led to dependence on European countries and the United States, turning into their raw materials appendage. So, Brazil supplied rubber and coffee, Chile – silver and copper, Argentina – meat and grain. By investing in key industries and giving loans, the leading Western countries influenced local governments, which was facilitated by the lack of solidarity between them and internal problems.