Of course ethanol is toxic, but our body is well equipped to process alcohol in small quantities. Also, no one here said that they drink alcohol to relax. I do it because I appreciate tasting good beer/wine, I never ever get drunk. Beer and wine have a history as long as humanity, being chanted by poets and bards, no wonder they have been proven to have lots of science-proven virtues and benefic effects if they are good. Also, do some research, caffeine and tea can be bad too - the occasional glass of wine is like the occasional coffee cup. Everything can be good or bad.