However, living in ignorance about the history and the origins of things that one is surrounded with is like showing disrespect to those who helped to create the modern world as it is known today.

ignorance 是名词，来自动词 ignore（忽视、不理睬），加上名词后缀 -ance 构成，表示"无知、不了解"的状态。前缀 ig- 表示否定，词根 nor 与 know（知道）同源，所以字面意思是"不知道"。