As conjecture has it, ancient man would store fruits for weeks or months. When the fruit was eaten, the juice was found to make one drunk. This juice qualified as the first primitive wine. Fruits and other crops naturally turn to alcohol if kept long enough, a process called fermentation. In the fermentation process yeast converts sugar into a mix that contains as much as 15 percent alcohol.
Wines are usually fermented from grapes, the best wines almost always are.
Some wines are made from peaches, apricots and other fruits. Making beer is a little more complex. Barley and other grains are sprouted, toasted and formed into a mash by grinding them up with water. This mash naturally contains sugars. These drinks are made by a process called distillation.