For whom did Hashem create the Universe?

The entire Torah speaks of how He chose us and only us. He has no business with any other nation in the world.
"Shelo asanu k'goyai haaratzos v'lo samanu k'mishpachos haadamah."; He did not make us like the other nations of the world. 

We need trees, we need flowers, but the Jewish people -they are the ones for whom the world was made. We are the holy nation, the purpose of the universe. -- Perfection in Marriage