What is the difference between Calvin and Luther in their theological beliefs and teachings?

Calvin and Luther were both key figures in the Protestant Reformation, but they had some differences in their theological beliefs. One major difference is their views on predestination. Calvin believed in the concept of double predestination, where God has already chosen who will be saved and who will be damned, while Luther believed in single predestination, where God chooses who will be saved but does not actively choose who will be damned. Additionally, Calvin placed a greater emphasis on the sovereignty of God and the idea of total depravity, while Luther focused more on the idea of justification by faith alone.