Where The Earth Meets The Stars

Years ago, outer space began to be colonized by a man. He was a genius among the ignorant of the Earth, and people knew and revered him. He gathered followers to aid in his research. He created long-term living spaces, first on asteroids, then on the moon. He moved to other planets soon after. This did not go unnoticed. More than half of the world helped him to make space livable. And so was born the Outer Human Empire. The man became the emperor, and soon married. His wife bore him a single son, a solemn little boy called Dan.
The rest of the humans who remained on Earth also elected a king to lead them. His son, the Earthbound Prince, was named Phil. He was happy and bubbly, and loved to go outside and be in nature. He may have had blood parents, but do not get confused. Mother Earth was who he really loved.
There was lots of turmoil and hatred between the Outer Humans and the Earthbound. Every day, there is a gathered uneasiness. War may spring up at any moment. The Earthbound have the cover of their lush planet, and an infinite supply of resources and food, but the Outer Humans have the advanced technology to terrorize it, despite the trade that must go on for them to survive. Ever since space's colonization, they have not gotten along, and there is little hope that they ever will again.
But will the two princes be any use? Will they bring the two kingdoms to peace?