In one of your responses you say that there was no need for the Qur'an to expressly declare alcohol haram. I understand the following verses do declare it haram. Please comment.
Say: the things that my Lord hath indeed forbidden are: shameful deeds, whether open or secret; (sins) and trespasses against truth or reason; assigning of partners to God, for which He hath given no authority; and saying things about God of which ye have no knowledge. (Q 7:33)
They ask thee concerning wine and gambling. Say: "In them is great sin, and some profit, for men; but the sin is greater than the profit." They ask thee how much they are to spend; Say: "What is beyond your needs." Thus does God Make clear to you His Signs: In order that you may consider. (Q. 2.219)
As you see Allah has declared sin haram witch accurse in surah 7:33 and 2:219 in regards to alcohol.
We believe that the Qur'an does not name all the possible sins. A great number of things can be determined in the light of the human fitrah, universal moral principles and the previous religious traditions. That is why here we find the Qur'an referring to the fact that the wine and gambling involve sin.