What does fredrick douglass talk about to the 600 people that makes an impact

The 500 to 600 people who heard Douglass speak were generally sympathetic to his remarks. ... In this Independence Day oration, Douglass sought to persuade those people to embrace what was then considered the extreme position of abolition.

Explanation:

Ancient Rome was an agrarian and slave based economy whose main concern was feeding the vast number of citizens and legionaries who populated the Mediterranean region. Agriculture and trade dominated Roman economic fortunes, only supplemented by small scale industrial production.