While most people in his age and era thought the Universe revolved around the Earth, Copernicus believed that the Universe revolved around the Sun. This was called the heliocentric veiw.
The Greek Orthodox Christians, Holy Roman Empire, Roman Catholic Church, Franks of France,
“Brinkmanship” disputing over something to where the brink of war might happen but never engaging in battle
For example, the Cuban missile crisis is an example of Brinkmanship
