Do you not see that year after year mankind is living better and better? If I had a time machine, I would have gone 100-150 years ahead, registered for social support, and lived in a dormitory with a couple of personal robots.
It was in an old fantastic show. All of humanity, without speaking, has rushed alone to a bright future. The future is not to be created by anyone. Everyone looks out of their time machine – and here is an emptiness, not a bright future. And it flies on itself, further and further. The end.