Looking at the world around us, at the relationships between people, we can safely say that the end of the world is already in full swing. It all depends on what you mean by "end of the world".
It depends on what is the point of investing in this wording, if we consider the end of the world as the end of mankind, then this can happen at any time, the stocks of nuclear weapons of course will not be enough to destroy all life on the planet, but to change the ecological situation beyond recognition to enough for the planet. If you look at it from the point of view of the universe, then it will happen very very soon and it will take billions of years. You can read about all possible scenarios in this article: