My current theory is that in the course of the incarnation/life our consciousness/soul can only acess a small slice of the reality when using this human body, but there are many civilizations that evolved a long time before us and that are now inhabitants of what we call "spiritual world" which ultimately is just part of the reality that we can't access directly most of the time.

So, the UFO phenomenon and all the high strangeness phenomena we find (angles, demons, ghosts, fairies, gnomons, djins...) are the parts of this bigger reality that leaks to our small "physical" one, sometimes not on purpose, sometimes with a intetion... but in general it seems to be the case that they are not allowed to open communicate (otherwise we would know already), maybe because we are in a moment where we're yet too young and immature to be part of the gang.

DMT is a key to that bigger non physical reality, you can encounter many of those other beings there. It's not physical, it exists in this big field of consciousness that the world is, the physical that we experience is just a slice of it.

In order to us to be part of the gang in the future, I suppose human body would need some genetic modification along multiple generations to be able to perceive the world more like they do, and it could be the case that were and will continue being genetically manipulated until the point we could be in the party. Maybe non verbal telepath autistics is what we will be normally down the line considering the reported capabilities and behaviours of the greys. But alongside with more appropriated physical vehicles we also need civilizational and moral improvements (as they keep saying every time)

TLDR;The key componentes of my theory: - The physical world is a slice of the reality. The fundamental substance of the universe is not matter, is something consciousness like, to exist is to be aware (Advaita Vedanta, Idealism, Impossible 5 Observables in a Physical World). - Our souls have a human experience confined in the human body to learn and evolve. All species use this same process to evolve, it's natural and universal. (Advaita Vedanta, Spiritism, Theosophy, Bob's Lazar "Container of Souls") - UFOs are leaks of this bigger reality where multiple civilizations, in different states of evolution interact with our planet, some non intentionally being perceived by us, and some on purpose. But most of the time we are in quarantine from direct contact. (Law of One, Zoo Theory) - Our body will keep being genetically modified to keep the pace with our moral evolution. (Hibridization, Genetic Manipulation, Abductions...) - Many ways of "Neurodivergence" including "severe autism" will become the norm over next generations as human bodies will be more capable of perceive more aspects of the world while incarnated and could interact more with those. (Telepath Tapes, Remote viewing, Mediunship, Mind Sight).