Rebuilding Order in the Post-Apocalyptic World

After a sudden apocalypse, the protagonist obtains a System and begins rebuilding human civilization. This is the story of a hero saving humanity. It may be a bit old-fashioned, but I won't make it too cruel, and there won't be any saintly do-gooders. Human nature won't be portrayed as completely dark, either. In the early stages, he'll build a safe zone, gather the remaining humans, restore farming and basic industry, and eliminate dangers. Later, he'll use the System to develop technology, only to face an invasion by another civilization. After finally defeating them, Earth will shatter, and he'll head to another new planet to begin a new civilization.

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.