, people began cutting their food into tiny pieces so it would cook faster.
The bite sized morsels rendered table knives obsolete, as there was very little left to cut. However, they were now perfect for eating with chopsticks, which were also made from cheap materials and easily made. Thus, a trend was born.
The table knife's decline in popularity in these regions at this time can also be attributed to the teachings of Confucius, who was a vegetarian. He believed that knives weren't appropriate to eat with. As Confucius supposedly said,
The honourable and upright man keeps well away from both the slaughterhouse and the kitchen. And he allows no knives on his table.