Can a primitive balsa wood raft successfully traverse the Pacific Ocean to prove that ancient South American civilizations could have settled Polynesia? Thor Heyerdahl, an ethnographer and adventurer, presents his hypothesis that the migration patterns of the Pacific were influenced by pre-Columbian voyagers. He utilizes historical records, archaeological evidence, and his own experimental expedition to challenge the prevailing academic consensus of his time regarding maritime capabilities of ancient cultures.

This work is widely recognized as a classic of 20th-century exploration literature and remains a staple for those interested in experimental archaeology. While modern science has largely superseded Heyerdahl's specific migration theories, experts continue to cite the book for its significant impact on public interest in maritime history and the methodology of experimental navigation.