4th and Last of The Rashidun Khalifa-Ali Ibn Abi Talib
Ali ibn Abi-Talib (ra) was the cousin of Prophet Mohammad (pbuh) and the youngest muslim. He was not only a cousin but he was called the part of Ahle-Bayat (person of Prophets household).
He was khalifa during a period when the whole muslim nation was in chaos. His reign as a khalifa was very tough period of his life. Still he managed his responsibilities steadfastly. His life is full of guidance for all.