Astrophysics, future studies, history, and philosophy meld in this discussion of "Great Filters"—the obstacles or calamities that prevent civilizations from reaching advanced technological states, and in particular, the "technological progress necessary to make contact across interstellar distances." The authors emphasize that the ethical concerns accompanying technological progress are also crucial to mankind's evolution.

Some readers may wonder why interstellar travel and extraterrestrial contact are considered guideposts in humanity's present and future development, especially given the vast energy needs that our species has yet to harness. Other readers will likely infer that curiosity, a desire for connection, and sometimes even survival needs drive both terrestrial and extraterrestrial exploration. If Earth were openly, verifiably contacted by an advanced civilization, it is obvious how profoundly life-changing this event would be. The authors write: "The implications are profound, prompting global introspection about our species' place within the cosmic tapestry." Judging by the popularity of science fiction space operas in film and literature, as well as the broad public interest in previous and present real-life space missions, it is clear that astronomers and astrophysicists are not the only ones interested in what transpires beyond our planet.

The authors' thought-provoking arguments are organized into eight chapters, each conveniently marked with numbered and titled subheadings for ease of browsing and identification. While there are no footnotes or in-text citations, chapters have endnote references that provide opportunities for further reading. The illustrated chapter headings and attractive formatting create inviting windows into the cosmic ambiance of this persuasive and upbeat narrative. Jiang's and Rosen's interest in the progress of civilization brings hope, foresight, clarity, and a welcome bit of fantasy into this era of climate crisis, political discord, and existential dread. The book is a profound yet accessible addition to the existing body of work in future studies.

RECOMMENDED by the US Review

Return to USR Home