Naturally I have some bias, but it seems to me that AT LEAST in terms of ease of use, the fork and knife are superior to chopsticks. Why didn't China or Japan develop a similar "stabbing" type of eating utensil, but instead adopted chopsticks? And in South Asian cultures, they simply use their hands and different kinds of bread to basically scoop up food. A spoon or a fork seem fairly simple and primitive, yet immensely helpful. So, why didn't more cultures adopt them?