They were mainly agriculture based and slavery was free labor.
Their mental maps of an area
Feudalism was a combination of legal and military customs in Medieval Europe and Medieval Japan. It was a system of structuring society around relationships which were based on the holding of land in exchange of labor and service. This encompasses the wider society. A peasant was protected by his lord who would give him housing and security and the peasant would work on the lord's land. This is a typical example or characteristic of feudalism.
Watergate scandal would be the main thing.
But if you want a second answer to this then the Arab oil embargo because of how much people were unable to get gas or go to work.