I think you need to define what you mean by the word "life". Evolution describes a process of how present day observed life forms developed from life forms observed to have existed in past ages. That's it.
It doesn't describe cocktail party etiquette (though perhaps it can be used to analyze the why various individuals select particular courtship techniques.) It doesn't concern itself with philosophy or ideology or religion, or how minor pleasures or vices make the time an individual spends in existence more pleasurable.
No. Evolution mere describes that those plants and animals best adapted to a particular environment are more likely to survive in it, and hence more likely to produce offspring, which of course, will probably have those traits as well.
That 'natural selection' may destroy species when the environment changes is really not the question that evolution needs to answer. Destruction does not create new species. In addition, most environmental changes are far too quick for evolution to be able to change a species in time for it to survive. A species already has to have the ability to adapt to different environmental situations in order to survive environmental changes.