> subjugate other cultures (assuming you mean they're not conscious in other's minds)
Have you ever considered you might be a philosophical zombie? [0]
I'd ask what it's like, but of course you wouldn't be able to tell me.
Basically, we need to leave room for the universal answer (God) to fit into the definition.
If we ever scientifically figure out how consciousness arises in our brains, I think we will have a bunch of very depressed people on our hands. If the truth isn’t met with flat out hostile denial. I fear any answer that doesn’t leave room for God will be rejected.
Since we have the source code to AI, and thus a Godless understanding of how it works, AI will NEVER be deemed “conscious”.
Regardless of whether something is concious, we're not going to be (by lay definition) the smartest entity on earth.
We don't even have that much. Though, some people certainly think they do.
To name a few you may want to investigate:
John Locke, Gottfried Wilhelm Leibniz, Immanuel Kant, David Hume, G.W.F. Hegel, Arthur Schopenhauer, William James, Edmund Husserl, Sigmund Freud, Thomas Nagel, Ned Block, David Chalmers, Giulio Tononi, René Descartes, Daniel Dennett, Julian Jaynes, Michael Graziano, T.H. Huxley, Otto Weininger, Simone de Beauvoir, Jean-Paul Sartre, Maurice Merleau-Ponty, John Searle, Christof Koch, Bernard Baars, Max Velmans, Victor Lamme, Stanislas Dehaene, Antonio Damasio, Anil Seth, Peter Godfrey-Smith, Galen Strawson, Philip Goff, Colin McGinn, Patricia Churchland, Paul Churchland, Frank Jackson, Jerry Fodor, John Stuart Mill, Wilhelm Wundt, Franz Brentano, Carl Jung, Jacques Lacan, Michel Foucault.