Complex sentence: The phrase broad spectrum revolution refers to the way people adapted to the end of an ice age in the post-glacial environment following the around 15,000 BP in the Middle East and 12,000 BP in Europe during a wide time period, or broader spectrum.
Split into simpler sentences: The phrase broad spectrum revolution refers to the way people adapted to the post-glacial environment. This period began around 15,000 BP in the MiddleEast and 12,000 BP in Europe during a wide time period, or broader spectrum.