Football, like every other aspect of life is constantly evolving. Long ago, defenders (especially full backs) were required to only be defensively astute. Full backs in this said era had more in common with their center-backs than they did with the wingers in front of them; they were great tacklers, good in the air and excellent man-makers. As football has evolved, full-backs have grown to have more in common with wingers than they do with center-backs. Over the years, full b