The melody of If I Ruled The World by Leslie Bricusse runs 174 notes across 62 bars, 2:12 long in Ab at 160 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? If I Ruled The World chords and lyrics.