What role did Ivan I play in shaping Russian history?

Ivan 1 or Ivan Danilovich also known as Ivan Moneybag or in Russian Ivan Kalita was the grand prince of Moscow and the grand prince of Vladimir who was known for policies that increased Moscow's power and transformed it into the richest principality in northeastern Russia. He had a reputation for thrift and financial shrewdness that earned him the nickname "Kalita" or "Moneybag". Instead of conquering territory, he preferred to purchase. He also made Moscow the spiritual center of the Russian lands by forming a close alliance with the metropolitan of the Russian Orthodox Church.