Through a combination of the linguistics of a reconstructed language, archaeology, and comparative mythology, Deep Ancestors breathes life into the ancient Proto-Indo-European culture and religion. Ceisiwr states "This book must be considered a report on a work in progress. As time goes by, new research will be done, new ideas and data presented, and old texts and archaeology reinterpreted. This will require changes in the beliefs and practices of reconstructed Proto-Indo-European religion. Consider this a process of progressive revelation, except that instead of coming from the gods it comes from scholars."