What Was Martin Luther’s Breakthrough?

What Was Martin Luther’s Breakthrough? – “On October 31 we will celebrate the 504th anniversary of the day Martin Luther made his 95 theses public. But what exactly was Luther’s breakthrough? What realization did he come to that set the Western world on a course that would break the stranglehold of Roman Catholic authorities, produce Bibles in languages people could read, raise literacy rates across Europe, and birth thousands of new Christian denominations?”