A perfect allegory from a book that would kind of represent the first part would be Lord of the Flies. If you haven't read the book in middle school or high school, then watch
this for a good summary while laughing your ass off.
As for the second part, I'm not so sure what you're trying to say. Our lives aren't spread out for us. Well, my view on it doesn't agree with either free will or fate. There are restrictions that set your "fate" in life, but your choices will always differ because of a small portion of free will. I believe in randomness in life. There are many examples such as hinduism with reincarnation and probability in mathematics. There's always going to be a set of restrictions, a fate, and there's always going to be a choice of direction to approach it. The coming events determine your path in life. We can either take the restrictions of man being too small and too fragile to face space to explore and not do it, or we can choose to over come those physical obstacles with our mind. But, we do all have limits. Quantum Physics still can't be fully understood, we just know it works. I think Physical barriers are nothing to mankind, but our mental capacity is the problem. We're constantly overcoming this every day. History has proven we've overcome mental obstacles we do not know how to solve, but radically and randomly find an answer for. Although, we're always going to have something to push and do better, and honestly, we'll never have a limit for what the human race can mentally achieve. I think our extinction, when we finally stop thinking, will mark that.