Right, but how could colonies over such great distances have any meaningful commonality or purpose? Homo Sapiens evolved ~300k years ago. The Milky Way is ~10

Right, but how could colonies over such great distances have any meaningful commonality or purpose? Homo Sapiens evolved ~300k years ago. The Milky Way is ~100k light years across. It’s possible you’d have different species colonizing different sectors of the galaxy. And those species might be just as likely to compete with each other rather than cooperate.