Problems within the family, how can I prevent them?

A father, a mother, and two older siblings.
Someone who is aggressive, a person who wants a family and two going or is in university already. I’m proud to say my father has recently quit smoking but is discourage by his constant drinking consumptions. His aggressiveness and stubbron behavior was also carried into one my brothers by heredity. Both of my parents are “old fashioned” people with strict yet common beliefs to the modern society. My fathers acts usually would lead into a argument and sometimes a physical abuse, only to extreme cases. A controling person with a narrow mind. I’ve asked my mother before to seek help but in reality I know she wouldn’t not have the emotional will to do so or the abilty to speak fluent english. Life is hard enough as is when both siblings are gone starting at the end of this summer. What should I do?