What is the author's style in Pale Blue Dot: A Vision of the Human Future in Space by Carl Sagan?

The perspective of Pale Blue Dot is that of its author, Carl Sagan. Sagan came of age during the high tide of Western atheism and skepticism. Everyone intelligent wished to be seen as scientific because science was held in such high regard. As such, Sagan has almost the caricature of a scientist's perspective on history, value, religion and truth. He sees history as humanity struggling to evolve to higher forms, and sees science as the primary means through which higher forms of being are achieved.