Choices like this come along like the choice to go to war or to stay the choice tim o'brien made was nothing like this he knew what he wanted to do and he tried to but he couldn’t do it the choice he made had many strings pulled him back. He regrets the decision but he knows he can’t change them. There is a scientific theory that states that whenever we make choices that multiple universes are created from that choice one for each decision each world exists for the decision. every decision has a world one where everything is the same except if you chose to wear those blue jeans or black jeans. Some will be drastically different in the example there would be many differences if they had not gone to vietnam he would not be living in the states and would live in canada most likely.
Tim o'brien regrets staying in the states because of what he had to do during the war this choice affected his life greatly and now he has no way to change it.when we make choice we need to decide if we should worry about everyone or just us neither is wrong some people think choosing for yourself is selfish but it's not you need to do what you need to