I have recently watched this film after Michio Kaku referred to the movie in multiple Youtube videos about him, and I found that it was quite the vexing movie in actually making me contemplate its meaning, in contrast with the films nowadays. I haven't read the book by Arthur C. Clarke which was released simultaneously with the movie, so I don't know if there is already an explanation of the movie, but, notwithstanding, I want to know what you interpret the movie or what you would interpret the movie had you not read the book. My construction is that the movie is primarily motivated on the topic of evolution. In each of the four sections, we see the movie presenting the evolution of man and the theoretical evolution of man. Apes, who later become man, founded tools and begin utilizing them. Man has finally been able to use tools in the most optimal way possible. Tools have subsequently become out of the control of man now. Man has transcended their focus on tools and are now evolving to work on the challenge of death.