Here Are the Biggest World Events You’ve Lived Through If You’re in Your 50sHere Are the Biggest World Events You’ve Lived Through If You’re in Your 50sThis post may contain links from our sponsors and affiliates, and Flywheel Publishing may receive compensation for actions taken through them. Part of what has shaped you as a Gen-Xer is the series of world events you’ve lived through. 1988 – Prozac was first introduced in the United States and within 5 years was prescribed for millions of Americans. Prozac was first introduced in the United States and within 5 years was prescribed for millions of Americans. 2019 – The U.S. launches the United States Space Force, a branch of the military dedicated to space warfare.