In the marathon until 1900, Western Europe was at the forefront. There were times in history when this wasn't the case, and there were instances of being overtaken in the 100-meter dash. We don't know if future history will be an extension of the marathon or a repetition of the 100-meter dash. However, history will progress just like how the winners of marathons and 100-meter races are completely different people, and how the same person doesn't always win.
- Four Great River Civilizations Era
- Aegean Sea Era
- Mediterranean Era
- Atlantic Era
- Pacific Era - Present
- Arctic Ocean Era
- Moon Era
- Mars Era
Eras