Final answer:
Before the 1820s, deference in the United States was the practice of showing respect for individuals from the 'natural aristocracy' who had distinguished themselves in various fields of accomplishment.
Step-by-step explanation:
Before the 1820s, the concept of deference was integral to the United States' emerging political order. People showed respect towards individuals who were considered part of a 'natural aristocracy'—those who had excelled in military service, education, commerce, or had a notable family background. This societal practice underscored the early republic's socio-political ethos, where qualities of leadership and success were acknowledged and celebrated by the wider community.