Excerpts from Books and Wikipedia
"The son of Shah Jahan and Mumtaz Mahal, Aurangzeb, was given military and political responsibilities when young, but fell out with his father and fought a bitter war of succession with three of his brothers. . . . Aurangzeb's long reign was distinguished by his forceful rule, his personal piety as a Sunni Muslim, and his strict application of Muslim sharia law. He discouraged music, dancing, and art, destroyed Hindu temples, and executed the Sikhs' spiritual leader Guru Bahadur for refusing to convert to Islam. . . . [His] annexation of Bijapur in 1686 when he deposed the Adil Shahi dynasty was a high point. . . The cost was huge and left his treasury destitute. Despite apparently repenting of his excesses and advising his sons on his deathbed in 1707 not to follow his example, they too fought wars against each other and continued the conflicts with the Deccan and the Marathas, which eventually fatally weakened the Mughal Empire." [Furtado: 1001 Days]