Contemporary Insight Meditation teachers identify the five hindrances as obstacles to mindfulness meditation. Defilements encompass "all" mental defilements including both fetters and hindrances. Political conflicts and class overthrows removed these hindrances. Characters are also customized with advantages and disadvantages known as Edges and Hindrances. These traits were not hindrances but consequences of their literary gifts. The conception of duty arises from the existence of hindrances to the attainment of virtue. Fronsdal emphasizes that it is important not to see the hindrances as personal failings. With the suppression of these hindrances, the meditative development of insight yields liberating wisdom. These hindrances blind man's mental vision and make concentration difficult. These include Race, Traits, Edges, Hindrances and sometimes Powers. Many more hindrances can be identified. Agriculture in the region has since suffered from frequent droughts and other such hindrances. "Complications" represent special hindrances to the character. Until he began his work he met unexpected hindrances. Book Two begins with the elimination of Joan's hindrances.