What is the anthropic principle
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The ideas is that you look around you and realize that the world you live in is just right for you. If it were much different you wouldn’t be able to live in it.
Some people may consider that a miracle, other might point out that any world with observers in it must be fit for those observers to live in so the only observed worlds are such that they are just right for observers.
A simile that I have found very convincing is that of a sentient puddle of water marveling that the hole in the ground it lies in is exactly the same shape as itself.
Obviously we are shaped by our environment and we can assume that this holds true for any observer in any environment. We evolved to adapt to the world we live in, so it should come as no great surprise that the world we live in is shaped just right for us to live in it.
There are variations of this, that go on to make observations that of all the ways that a universe could be only the ways that allow for observers to come into existence will ever be observed, which is obviously true.
Other ideas are less obviously clear, but the general idea is that we should not be surprised to find that the universe looks like it was made for us, as we couldn’t actually live and make any observations in a universe that didn’t look like it was made for us.
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