Ignorance Is a Tragedy.
Ignorance comes in many forms but the fundamental meaning is a lack; something is missing. The missing element is knowledge.
Nescience is lack of knowledge caused by lack of experience, years or opportunity. Age, experience, or opportunity will remove nescience. Illiteracy is the inability to read the written word. The ability to read is a skill that must be learned. It takes a lot of effort and practice.
Superficiality is lack of knowledge because of lack of interest, effort, time or ability. Naivete is lack of knowledge of the significance of what is said or read. Finally, there are prejudice and bias. Prejudice is a closed mind; bias is a slanted mind. In either case, knowledge is missing or imperfect because of a mind-set.
Deliberate ignorance is a tragedy because the greatest natural resource, a human mind, is wasted.