Answer: Varies
Explanation: One way is they can cooperate with nearby countries.
Mahatma Gandhi is most famous for his successful application of non-violent methods, like civil disobedience. He was a source of inspiration for many world leaders including Martin Luther King Jr.; and in India, he is unofficially known as the Father of the Nation.
Thomas Jefferson, i believe.
Sources are used in a paper to show what ideas inspired you and whose theories you would be using and you cite the sources in order to avoid plagiarism. If you don't have sources, your paper will not be valid and you could get accused of plagiarism. The more sources you use the better but you should keep in mind that they need to be important for the paper and used with a purpose and not just to increase the number of sources.