- Pre-feudal Britain was inhabited by various groups including cavemen, Iberians, Gaels, Britons, and Anglo-Saxons. The Romans occupied Britain from 55 BC to 410 AD.
- Feudalism developed in Britain after the Norman conquest in 1066. William the Conqueror defeated King Harold and became the first Norman king of England. Feudalism established a strict social hierarchy with the monarch at the top.
- Parliament originated as an advisory assembly for the king but evolved to include representatives from shires and boroughs. This helped limit the king's power and marked the beginning of a constitutional monarchy in Britain.