- Big History aims to understand history as a whole by looking for common themes across time from the Big Bang to modern times using a multidisciplinary approach.
- The development of agriculture around 11,500 years ago allowed human populations to expand and civilizations to form with advanced technologies and large organized workforces.
- Geographic differences between continents influenced the uneven development of societies, with Eurasia developing key technologies like guns, steel, and horses before other regions due to its ecology.