What is the author's tone in the nonfiction book, Homo Deus: A Brief History of Tomorrow?

Though this work is intended to raise serious questions about humanity’s future, Harari’s tone is not overly ominous. Instead, he presents his predictions and views in a relatively neutral way and allows the reader to draw their own conclusions. This is aided by the fact that he rarely makes specific predictions. Rather than painting a detailed picture of what humanity’s future will be and judging individual aspects of it, he describes broad trends that will play an important role. Generally, the author encourages the reader to consider the ethical implications of their choices and those of their society, rather than stating his own ethical judgments.