Eagle Scout is the highest rank in scouting, the ultimate goal of a Boy Scout. After achieving Star and Life, you have developed your leadership skills to the extent that you can use them to guide others to follow in your own footsteps, moving up in the ranks as you have. The Eagle required merit badges have taught you to be a responsible leader, a mature adult, a good citizen, and an experienced outdoorsman. Earning the Eagle Rank is the ultimate test of these skills. It's difficult, but it's worth it.
See the current Requirements for Eagle Scout.