Fill a mixing glass with ice, add spirit, and stir well. Strain into a chilled martini glass and garnish with an olive.
During Prohibition, the gin tasted so bad that everything imaginable was added to it to mask the Ravor. The martini waned in popularity. After Prohibition, Nick and Nora Charles of the Thin Man movies and President Franklin Roosevelt put the Martini back on the map. Good gin was back, and people once more embraced the simplicity of the Martini. America got wetter and the Martini got drier: The Nick and Nora recipe calls for 3 parts gin to 1 part dry vermouth. This ratio reigned through the thirties and forties.