Equality: U.S. Americans uphold the ideal that everyone "is created equal" and has the same rights. This includes women as well as men of all ethnic and cultural groups living in the U.S. There are even laws that protect this "right to equality" in its various forms.
The general lack of deference to people in authority is one example of equality. Titles, such as "sir" and "madam" are seldom used. Managers, directors, presidents and even university instructors are often addressed by their first or given name.