Man's biases of their superiority to other races are one of the major causes that triggered the two wars: World War One and Two. After humans suffered from pain and loss caused by the two wars, humans began to understand that their overwhelming sufferings were simply because they held biases in their minds. In order to co-exist peacefully with other human beings and other races, it is important to eliminate discrimination pertaining not only to race, but also to gender roles, social ranks, age differences, and so on. By doing so, we can then create a harmonious global village for everyone to co-exist in.One of the ways to achieve this goal is to help children learn how and in what ways tales can convey biases as well as how tales can create an impact on the conventional concepts the readers have already mentally established. To do this, four groups of eight tales in total are chosen and discussed. The purpose of this is to show how tales can help construct biased concepts and how tales can also be used to help eliminate biases. These four groups of tales are also selected and formed in order to investigate the issues pertaining to general biases and specific biases such as race, gender roles, and social classes or ranks. This study intends to suggest that if teachers try to use and share both traditional and non-traditional (or subversive) tales with children in the class, they can help children eliminate their biases. By doing so, hopefully, we can be led to the path where an equal social structure can be created. Thereby, nations can have their peace.