The melody of What This World Needs by Casting Crowns runs 323 notes across 75 bars, 4:07 long in Am at 138 beats per minute. The tab sits almost entirely in the first two frets, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? What This World Needs chords and lyrics.