His problem cannot be fixed by promises or by ultimatums. He could be what we call a hoarder. He has these possessions that he cannot part with but yet he lives in filth . That is a lifestyle not bad habits. He actually needs therapeutic intervention. He cannot part with this things because he thinks they are valuable. Hoarders are often dirty and cannot see clutter. They pass by it without even noticing and it does not bother them. This is a form of OCD. His house is a collection of valuables but only to him. They become anxious at the thought of cleaning or ridding themselves of anything. This can overtake their lives. Everything becomes cluttered even having poor hygiene themselves. You can not fix this and probablu neither can he. He needs help. I would be more than bothered about this. But try to move him toward on this even if it is to call a collector and remove 2 books at a time
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That could be true. Especially since hoarding can be an impulsive habit and so is alcohol. If he is drinking beyond what is social then this is called binging. It leads to alcoholism. It is true that there aren't any shakes or blackouts. That comes later. But this is just as dangerous especially for his liver. It also has other consequences because the person often feels they don't have a problem. These people often can hold a job and feel they are fine. Eventually there will be problems especially in relationships that are impacted by this problem. This will trickle down to everything.