Hamartia (tragic flaw)
Hamartia, often described as a "tragic flaw," is a concept most prominent in poetics. Hamartia is considered by many to be a defining characteristic of Greek tragedy. Hamartia consists of some error of judgement or character that leads to a tragic chain of events. Thus, in tragedy, hamartia is often the root cause of all the main events as they unfold. Hamartia often involves some character flaw in the protagonist, such as hubris (pride), over ambition, or Indecision.