Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Our ancestors did not need the help of aliens

Our ancestors did not need the help of aliens to build the pyramids or to build Machu Picchu.Our ancestors (the Mayas, the Incas etc.) were good engineers. They had an advanced knowledge of hydrology, sustainable development, and structural design. None of this is mentioned in "Chariots of the Gods".A much better book on this subject is "Machu Picchu: A Civil Engineering Marvel", by Kenneth R. Wright and Alfredo Valencia Zegarra.