All sin devolves from pride, because when we transgress God's commands and created order we implicitly or explicitly make the declaration that we know better than God.
This is very apparent in the age of moral relativism when sins are justified because, "my situation is different," or, "I was born that way," or, "they did it to me," etc.
Wrong is wrong, and when we try to justify doing something wrong we presume to know better than God.
Keep in mind that when we think of some of the worst people in history, the Stalins, the Hitlers, the Mansons, etc., most of them felt fully justified in what they were doing.
BINGO. Every sin has pride at it’s root.