"Age of Reason" is a song by Australian pop rock singer John Farnham. Written by Todd Hunter and Johanna Pigott, it was released as the first single from Farnham's 1988 album of the same name. The song topped Australia's ARIA Singles Chart for four weeks and became a hit in New Zealand, where it peaked at number four. At the APRA Music Awards of 1990, the song won the Most Performed Australasian Popular Work award.
"Age of Reason" was composed by Todd Hunter and partner Johanna Pigott, who had previously written the song "Rain" for Dragon and played together in the XL Capris. Pigott said, "You write songs and you're surprised at what you wrote sometimes, and you think, goodness, is that me, did I do that? It's not something you consider of perfect taste or anything, and someone records them and you think that's fantastic. It's a really exciting and thrilling thing."
The music video for "Age of Reason" was filmed in 1988 and included six key scenes, with the Victorian Children's Choir in three of the sequences: running through a scrap metal yard, running down a hill behind Farnham, and standing in a warehouse as Farnham walks between them.
In the "making of" feature included on the ' DVD, Farnham can be seen singing with the children after the film clip wraps shooting in the warehouse. They each received a copy of the track on vinyl.