Who developed the doctrine of nonviolent civil disobedience known as Satyagraha?

Mahatma Gandhi

Who opened the Chamber of Secrets fifty years before Harry's second year? In Orthodox Christmas traditions, what date is Christmas Eve celebrated? What major archaeological discovery did British archaeologist Arthur Evans undertake on Crete around 1900? In Chrono Trigger, what invention allows the party to travel through time? What is the decimal equivalent of the binary number 10?