Final answer:
Lewis Henry Morgan viewed technology as the key factor for cultural advance, marking both progress and the ability to evolve society.
Step-by-step explanation:
Lewis Henry Morgan, an American anthropologist, believed that technology was the primary driver of cultural evolution and thus considered it to be the main measure and cause of cultural advance. Morgan's perspective suggested that advancements in technology led to new social practices and ideologies, thereby advancing civilization. He saw technological innovation as both a marker and a mechanism for cultural progression, and this view was part of a broader set of ideas regarding cultural evolution during the 19th century, which included the notion of certain races or civilizations, particularly Caucasian or white, imposing their way of life as a form of improvement over others.