I've talked about how intergenerational trauma has affected my family before, although I didn't mention it started in 1918 when my great great grandfather killed my great great grandmother in a murder suicide, leaving my great grandmother an orphan who would one day abuse my grandma. [1]
I think there are patterns to abuse regardless of the cause. Abuse is essentially addiction to control or anger (the seven deadly sins are all forms of addiction). The patterns I can see give me hope that it is entirely possible to stop the cycle.