"If I Ruled the World (Imagine That)", often shortened to "If I Ruled the World", is a song by American rapper Nas featuring vocals from American rapper and singer Lauryn Hill. It was released as the lead single from Nas' second studio album It Was Written on June 4, 1996, by Columbia Records. Produced by Trackmasters, with some uncredited input by Rashad Smith, it is based on the 1985 hit of the same name by American rapper Kurtis Blow and samples the beat of "Friends" by Whodini. Hill's verse interpolates the song "Walk Right Up to the Sun" by the Delfonics. The single marked Hill's first musical appearance outside of the Fugees.
"If I Ruled the World", bolstered by a high-budget music video directed by Hype Williams and designed by visual artist and designer Ron Norsworthy, became Nas's first single to gain mainstream notice. The single reached number 53 on the Billboard Hot 100 chart, while it also peaked in the top 20 on the Hot R&B Singles chart. In total, the single reached the top ten in eight countries. It received a nominated for Best Rap Solo Performance at the 39th Annual Grammy Awards. Various publications have referred to it as one of the greatest rap songs of all time. In June 2021, "If I Ruled the World" was certified Platinum by the Recording Industry Association of America, becoming Nas' first single to achieve this.