U2 formed as a crew of friends in secondary school in Dublin, Ireland before any of them had any real proficiencies with music. Within four years they scored a record deal. By their fifth album they became a global sensation. In the present they’ve won 22 Grammy Awards, more than any other band, period. Part of their success is every time they run into controversy or boredom from their fan base, they evolve and revolutionize their sound. They’re huge experimenters, and The Edge really exemplifies this with his guitar pedal array.