For those who fear that acknowledging the historical fact of evolution dooms one to a life of bleak insignificance, consider the following.
You are the product of an absolutely unbroken chain of successful ancestors stretching back nearly 4 billion years. In all that time, over billions of generations, not one member of your lineage ever failed to leave viable offspring who, in their turn, left yet more successful descendants. Not a single earthquake, volcanic eruption, meteorite impact, or glacier ever prevented one of your ancestors from contributing to the subsequent generation. Every one of your forebears prevailed in the face of predators, famines, parasites, diseases, and ill fortune. Whether in competition or cooperation, your antecedents triumphed. An untold number of beings have lived and died on this planet, but never — not a single time — did your line falter.
In this, you are not alone. The same is true of every living being on Earth, to whom you are connected directly through converging lines of common ancestry that date back to the very dawn of life. The world did not know you were coming and the machinations of nature did not have you in mind as an endproduct, yet here you are. As an individual, you and each of your brethren, cousins, and more distant evolutionary relatives represent an exceedingly, remarkably, staggeringly improbable occurrence — and are all the more wonderful for it.