Why do things happen? Utter speculation and a little silly!!! Perhaps

Is there a natural order in the Universe? Is there a reason why things happen?
For example, when writing a sentence to express an idea, why is it that some words work better than others, and why is that we can write a sentence that conveys an idea so well, and other times, the meaning remains ambiguous?
What is the relationship between us, as human beings, the bigger universe, and life (in general) on Earth?
The concept of the "cosmos" implies that all things are inter-related. That the stirring noise of the cicada, which can be annoying, may in itself have a greater purpose beyond the noise, and its creation!! If only we can see what it is.
The flight of a seed after release, may in itself provide a natural model for a new aircraft.
The human race is copycat race. It innovates slowly, Its use of technology both advances and retards the human race, or limits the development of innovation.
Everything happens for a purpose, perhaps. I am not talking a the concepts of destiny, or a higher cause, or even any of the caballistic notions that Madonna believes/believed in.
The film Avatar was interesting from one standpoint, in that it mentions the idea that the whole planet was interconnected, the same notion is inferred more directly through the "force", which remained mysterious in eps 4,5 and 6, and was given a quantifiable nature in ep 1. Yet what if such an interconnection exists. Don't think I am getting carried into lala land by Hollywood.
What if the connection is not so much in what we can't see, but more so lies in what we don't at this stage understand. Put vaguely, we don't understand what we don't understand because we don't know what we are looking for.
Foe example, all life on the planet is connected by a common element we call DNA. Between species, the differences may be quite small, yet man cannot speak to an ape, or a dog, etc. Yet we share a common gene pool.
I wonder what the rate of vibration of the DNA molecule in the human being is, compared to the rate in a cicada. I wonder if they ever might be the same. What would happen if they were the same?
I began by asking the question why do things happen? Is it possible to control one's destiny in a "random" environment, or are all things programmed to occur, however we don't have the key to the program?

Why on some trips do the traffic lights seem to be in our favour, and other times, we just get red ones?