There may not be a perfect formula to know exactly what will make a car popular — as much as auto manufacturers might wish there was. But most of the cars we've loved over the years often strike the balance of style, efficiency, and plenty of bang for the buck. Whether we're driving a sporty muscle car like a Ford, a sturdy and reliable ride you can drive into the ground, or a spacious classic to transport the family, certain cars capture our attention and become best-sellers — in some cases for generations of drivers. To find out which cars and trucks have been the most successful at winning the popularity contest of the road, we took a look at approximate global sales numbers for vehicles over the past half-century from a variety of automotive sources. Here are the most popular cars of the past 50 years, ranked by sales numbers — find out where your favorite ride falls on the list.