The answer is B: Noble Savage.
Explanation for each option:
A. Barbarism: This term generally refers to a state of society that is considered to be primitive, uncivilized, or lacking in culture and refinement. It does not specifically describe the idea that people are naturally good and simple.
B. Noble Savage: This concept, often associated with the philosopher Jean-Jacques Rousseau, describes the idea that humans are naturally good and pure when not corrupted by the influences of civilization. The "noble savage" is seen as living in a state of nature, free from the vices and complexities of modern society.
C. Primitive: This term is used to describe early stages of human development or societies that are considered less advanced. It does not inherently carry the notion of natural goodness or simplicity.
D. Uncivilized: This term is used to describe societies or individuals that are perceived as lacking in cultural, social, or technological development. It does not imply that people are naturally good or simple.
Therefore, the correct answer is B: Noble Savage.