2020 - World War Three, imperialism takes place where countries need resources and cant find anymore on their lands.
2030 - World War Three end, there are only a few countries, USA owns all of north america, south america unites, europe unites, etc etc
2031 - World Peace Treaty signed.
2040 - Technology developed, people start colonizing the moon.
2050 - Mars colonized
2060 - Inner Solar System filled with colonies, trade deposits and minor colonies developed in the asteroid belt.
2065 - Jupiter's moons colonized, heading for the rest of the planets
2080 - Whole solar system filled with colonies.
2100 - Light-speed ships developed, colonial ship heading for the nearest star system, Alpha Centuari
2105 - Ship arrives, outer most planet colonized
2113 - People start developing faster than light communication and traveling, more planets are colonized at Alpha Centuari, etc