Radiation Therapy refers to the use of radiation to treat cancerous or benign tumors as well as other medical conditions using high-energy X-rays. As this technology has been able to grow and advance, radiation therapy has been able to help many people. There is still plenty of work to be done in this field, but it is important to know where we started in order to help see where we are going. I present to you: The Evolution of Radiation Therapy.