If it is, nature is doing a lousy job. Seems like people are more stressed than ever. Dont believe me, call Time Warner Cable or anyone and try to get a live person, or take a drive on the free way for fun.
No, I don't think that nature wants us to evolve as cool, calm and composed. How boring! Anyone who has ever felt excitement over an accomplishment, felt love for another, experienced a thrill of participating in a competitive sport, felt anger at an injustice or experienced a myriad of other feelings knows that life is not all about being calm and composed.
At a more basic level, those that are calm and composed would not survive the struggle for basic needs like food and shelter. I agree that periods of restful calm are lovely at times, but without some stress and excitement, life wouldn't be any fun at all.
No I really do not believe nature intended any of us humans to be, Cool, Calm and Composed. That's something only done well by Actor's and Actresses, playing out a part, or character in a movie. Like Dirty Harry, for example!
For one thing, there are way too many un natural stessor's not caused by Mother Nature and the environment, that can throw our inner, emotional and physical time clocks...Way Off!! And this definitely is not the way nature meant it to be.
Unfortunately, not. Being in a calm, cool, composed state is something most of us have to work at amidst the daily pressures of stress and expectations. I do think it is attainable if we strive for it.