But what of those who exist in alternate realities that are unlike our perception of ours? Mental realities that shape people into seeing things differently? Is reality not merely a manifestation of our own minds because it's different from theirs? Perception is individual, and intricate, and it shapes everyone into seeing how things operate differently. Especially how we as humans operate. Also, I think that the concept of reality changes with circumstance.
“Whoever will be free must make himself free. Freedom is no fairy gift to fall into a man's lap. What is freedom? To have the will to be responsible for one's self.” - Max Stirner.