As I understand it the fork was invented after Europeans came back from the far east and saw the locals who they viewed as savage using chopsticks and decided it was no longer proper to eat with their hands. I can imagine that a chopstick is the intuitive solution for someone who doesn't want to eat with their hands but what was it about the Asian cuisine that necessitated this?
More can always be written on this, but you might be interested in these earlier answers to similar questions:
"In asia, how were chopsticks invented and chosen as a more practical eating implement than spoons and forks (which they also had)?" , by /u/cthulhushrugged and [deleted] here .
"How did Chopsticks spread to so many different regions in Asia?" by /u/keyilan .
This is not to discourage further discussion. More depth and viewpoints can always add to the AskHistorians knowledge base.