Ok, so let him move in with you . . . and see how it goes.

It sounds like you are willing to let him stay with you, but that is contingent on him making some changes. I'm not hearing where he has any real commitment to doing what you think he should do. Will you be supplying him with meals? Can you afford to buy groceries for two? Does he have any source of income at all?

You sound like a caring person. I do not think you would say that "he is not a good person" without some very solid reasons. I totally believe you that your parents are not a good influence on him and that he "is broken." At least you are managing and surviving. Living with you will probably not solve any of your brother's issues. It will get him away from the negativity of your parents, and maybe he will be happier . . . for awhile. I think that will be at your expense.

It's heart-breaking to see someone going down the drain. At this point, though, I think the only person you can save is you. But take him in, if this seems like the right thing to do.