It might seem as though we are all separate, and individual from one another and our environment. While that may appear true and could very well be true in some ways, we are also all connected at the deepest levels of existence. When understanding this, we can look at how we operate daily and begin to ask questions: Why are we so concerned with dominating one another? Why do we strive to be better than others? Why do we chase pieces of paper so that we can have more and more things? Why do we judge one another? Why are we unable to be at peace?
Personally I have not done psychedelics so it cannot be completely accurate for me to say exactly what you would feel while doing them. I can say that I have had many experiences where I experienced immense levels of peace and wonder, complete peace with myself and seeing the environment around me as nothing more than vibrating energy. Meditation can lead to feelings and experiences that can resemble much of what is described by some who have done psychedelics, but the experience may not be fully the same. Either way, if you are able to attain these understandings on your own or through the use of psychedelics, it is clear there is a common universal understanding in what is concluded from both experiences.
We are all connected. We are all one. We are all vibrating energy and our mind is not who we are. These are just a few of the many common conclusions brought forth by either psychedelics or meditation. Many have had their lives completely changed by coming to these conclusions. This is why we might ask; why are psychedelics illegal? Some are completely natural and offered to us by nature, yet they have been made illegal. Does this seem odd?