Your brain balances on two pedals. One slows it down, a system called GABA. One speeds it up, a system called glutamate. Calm is the two of them in balance.
Alcohol stamps on the brake and eases off the gas. That is the warmth and the looseness you feel. For a few hours, the brain runs slow.
The brain does not like being held down. So while you drink, it quietly pushes back. It weakens the brake and leans on the gas, fighting to return to normal.
Then the alcohol wears off. The brake it was fighting is suddenly gone. But the gas is still floored. So you do not land back at calm. You shoot straight past it.
A racing heart. A tight chest. A worry with no name. The same anxiety the drink was supposed to switch off, now turned up louder than before you started.
It wrecks your sleep too. Alcohol knocks you out fast, then cuts the deep sleep and the dream sleep that actually repair you. That is why 8 drunk hours still leave you tired.
The World Health Organization keeps the ledger: 2.6 million deaths a year are attributed to alcohol. That is about 1 in 20 deaths on earth. Around 400,000 of them are cancers. Around 700,000 are injuries: crashes, violence, self-harm.
And it is sold as the opposite of all that. An industry worth well over a trillion dollars a year advertises friendship, status, and reward. Never the molecule.
By body count, alcohol is among the deadliest recreational drugs on earth. It is also one you can buy at a supermarket counter, while milder things carry prison time.
That gap between harm and legality was not drawn by a measurement. It was drawn by history, by tax revenue, and by which trade got organized first. Nobody sat down and drew it. It grew.