The Terrestrial Age

The Terrestrial Age refers to the entire period of time where mankind was primarily confined to "Terra". This accounts for the vast majority of mankind's history.

Terra
Despite the generally technologically advanced people of the Starlit Age canon, there are very few documents that directly reference the planet of humanity's origin. Stranger though is how there is a complete lack of documentation, data, or information about the planet itself. People aren't even sure the planet is called "Terra" but for lack of information and alternative, they do so in the Starlit Age.

Primary Motivations
The primary motivation for planetary expansion and space exploration, as far as the tail end of the Terrestrial Age, was predominantly negative. Ideologues, politicians, and activists had asserted any number of reasons that this was a necessity to ensure the continued survival. However, not for lack of truth to some of these arguments, they provided to be insufficient to make the case. Ultimately, positive motivations paved the way for humankind's first steps into space.
 * Climate Change - Assertions of this type would claim that the planet was on course to become uninhabitable as a result of the environment becoming less ideal for human life.
 * Overpopulation - Assertions of this type would claim that the growth of humankind's population required more space.
 * Finite Resources - Assertions of this type, similar to that of overpopulation, claim that mankind would use up all the resources available to it on the home planet.
 * Nuclear Evasion - With the potentially cataclysmic consequences of nuclear war becoming evermore possible and probable, spreading the human population into space would allow humanity to hedge its bets against the seemingly inevitable nuclear catastrophe.
 * Humankind's Destiny -
 * "Are we alone in the universe?" -