上降文通大￥2，Brief Ideas of Liberalism SHANGHAI JIAO TONG UNIVERSITY A.Human Nature Humans are self-interested and rational. They are capable of acting autonomously by using their capacity for reason to discover the most efficient means to satisfy their needs and desires. They can make their own decisions and they are capable of autonomy and self-government. 1日G2, Brief Ideas of Liberalism A, Human Nature. Humans are self-interested and rational. They are capable of acting autonomously by using their capacity for reason to discover the most efficient means to satisfy their needs and desires. They can make their own decisions and they are capable of autonomy and self-government