Does anyone know who invented chopsticks and which countries uses them?

Chopsticks were invented and developed in China about 3,000 to 5,000 years ago, although the exact date is unknown.

Tools resembling chopsticks were unearthed in the archeological site Meggido in Israel, belonging to Scythian invaders of Canaan. This discovery may reveal the existence of a trade relationship between the Middle East and the Far East in early antiquity, or may be an independent parallel development. Chopsticks were also common household items of civilized Uyghurs on the Mongolian Steppes during the 6–8th centuries.

Chopsticks, a pair of small even-length tapered sticks, are the traditional eating utensils of East Asia (China, Japan, Korea, and Vietnam, the four "chopstick countries") as well as Thailand, where they are now restricted to just soup and noodles since the introduction of Western utensils by King Rama V in the 19th century

The Asian culture were the first to use chop sticks--which are still widely used in areas of China, Korea, Vietnam and Japan....something to suggest possibilities these people may have at one time communed in a large country---then "branched off" to form their individual countries and cultures of life.