Is it a big or a short time?
Like everything in our world, this value is relative. But it was during this time that we became human beings.
For 30 000 years we have become the kind that we know now. And during this time our bodies have not changed at all in comparison with the bodies of the ancient people that we used to be. Even our brains have not changed for 30,000 years. He remained the same.
However, we have become smarter. Much smarter. For 30 000 years we have built what we call civilization. We created technology, created science. We know so much in comparison with our ancient ancestors. And we delightfully analyze the information. For such a short (on the scale of evolution), humanity has stepped forward at an unthinkable distance, without changing biologically.
Due to the fact that our brain has not changed, modern children are born with the same level of intelligence as 30,000 years ago - with zero. That's why they need to be taught seven years to be a person, and then another 11 years to teach to be an intelligent person, then a few more years to teach to be an intelligent person and all life further people learn to create knowledge that will become mandatory for the next generations.
Knowledge. It's an interesting thing, right? A unique resource of humanity, which everyone can take over.
But now it's not about that. Our intellect is a kind of muscle that we "rock" all our life. Like ordinary muscles, this one has its own price for improvement - exactly the same fatigue. Our mind has overtaken the body too much and, as a result, there has been stress. Our mind knows what it is, but the body does not and starts throwing out adrenaline, as if we were wounded. This will persecute us always, until our mind finds a way of artificial evolution. For her the future.