If Qui-Gon Jinn had lived, it would have had a significant impact on the Star Wars universe. Here are some possible scenarios:

1. Anakin Skywalker might not have turned to the dark side: Qui-Gon Jinn was the only Jedi who believed that Anakin was the chosen one, and he saw the good in him. If Qui-Gon had survived, he may have been able to continue to mentor Anakin and help him stay on the path of the light side of the Force. Without Qui-Gon’s guidance, Anakin was more vulnerable to the manipulation of Darth Sidious, which ultimately led to his fall to the dark side.
2. The Clone Wars might not have happened: If Anakin had not turned to the dark side, he would not have become Darth Vader, and the Clone Wars may not have happened. Qui-Gon Jinn may have been able to prevent the creation of the clone army or find a diplomatic solution to the conflict.
3. Qui-Gon Jinn could have trained more Jedi: Qui-Gon Jinn had a different approach to the Force than the rest of the Jedi Order, and he may have been able to train more Jedi in his ways. This could have led to a shift in the Jedi’s philosophy and the way they interact with the galaxy.
4. The balance of the Force could have been restored differently: Qui-Gon Jinn believed that the Force was out of balance and that the prophecy of the chosen one was meant to restore balance. If he had survived, he may have been able to interpret the prophecy differently and find a different way to restore balance to the Force.

Overall, if Qui-Gon Jinn had lived, the Star Wars universe would have been very different. His unique perspective on the Force and his willingness to question the Jedi Order could have led to significant changes in the way the Jedi interacted with the galaxy, and the ultimate fate of Anakin Skywalker and the Jedi Order.