There are about 7,800,000,000 people on planet Earth at this time. So many people and yet I am unique. I have differences to others. Although I have similarities to other people, when you consider all of my physical characteristics and my vast realm of thoughts, on the whole, I am unique.
You are unique too. It seems everyone has a different DNA, even if ever so slightly. People have a different set of fingerprints too. There are also all the different experiences we have had and the different thoughts, interpretations and perspectives that brings.
At the top of the pyramid we are all the exact same. We are all humans. So none of us are different from the top level perspective. We are all absolutely the same in that regard. Now sometimes people use their senses to play spot the difference. So a dividing of the humans begins.
Many groups are formed, theoretically, by age, sex, height, eye colour, hair colour, skin colour, religion, education, birth place, geography, political views, wealth, career, and relationships. This only covers a tiny portion of the ways we can split ourselves into unique groups and divide ourselves.
If you continue to split yourself into sub groups, however, you will conclude that you are absolutely unique. There is no group of people who are exactly like you in it.
So say it with me. I am unique.