In many countries, illiteracy is one of the long-lasting problems, especially in developing countries. There seem to be two main causes and three effects, which we will discuss here. Maybe the main cause is the difficult living condition, including income poverty. Children born in a poor family cannot get education because parents can only supply primary needs such as food, clothes, and shelter. this can be toughing for family to buy the eligible things for their children going to school. Also entire known cause is parents with leading to paying less attention to their kids' education. Furthermore, children maybe lose interest in learning and drop out of school. The effect of this problem on people of a certain level can be bad result. Firstly, illiterate people have some problem in taking new skills and reading, writing, understanding the basic data. it seems that hard jobs can be found for illiterate people. Illiterate people are usually salary less because of limite...