What is the main conflict in The Miracle Worker by William Gibson?

William Gibson constructed a drama around the events that took place when Helen Keller and her teacher, Anne Sullivan, first met in the 1880s. The exchanges that take place in The Miracle Worker are all derived from factual events that Gibson has woven together to construct a fluid, emotionally real, depiction of the "miracle" Anne Sullivan was able to work: teaching Helen Keller language.