The song was inspired by lead singer Bono's experiences in Nicaragua and El Salvador in July 1986, following U2's participation in the Conspiracy of Hope tour of benefit concerts for Amnesty International.
The song was written on a Spanish guitar, and the melody lifted from a piece Bono composed in Ethiopia in 1985 to help teach children basic forms of hygiene.
[4][5] The drum beat provided by Larry Mullen Jr. was processed through an effects unit that gave it a drone-like quality, which bassist Adam Clayton described as "evocative of that sinister death squad darkness".
"Mothers of the Disappeared" was favourably received by critics, who variously described it as "powerful",[6] "a moving tribute",[7] and containing "stunning beauty and sadness".
It was revived for four concerts on the 1998 PopMart Tour in South America, and for two of them, the Madres joined the band onstage for the performance, one of which was broadcast on television in Chile.
Castro had been tortured and held in a concentration camp for two years by the dictatorial Chilean government because his artwork criticised the Pinochet-led regime that seized power in 1973 during a coup d'état.
[1] The Madres' children were usually young people who had opposed the government during the Dirty War, and the coup d'état that brought Jorge Rafael Videla to power.
[12] The Madres joined together to campaign for information regarding the locations of their children's bodies and the circumstances of their deaths, believing them to have been kidnapped, tortured, and murdered.
[13][14] Inspired by the mural, Bono took an extended break from recording into July, traveling to Nicaragua and El Salvador with his wife, Alison Hewson, to see first-hand the distress of peasants bullied by political conflicts and US military intervention.
The shots were a warning and, according to author John Luerssen, the incident made Bono realize that "they didn't care for their intrusion and they could kill them if they felt compelled.
[14] His experiences in Central America inspired the lyrics of "Mothers of the Disappeared" and another track from The Joshua Tree, "Bullet the Blue Sky".
[14] The drums, played by Larry Mullen Jr., were lifted from another song ("One Tree Hill", as reported by engineer Dave Meegan)[21] by producer Brian Eno and subsequently slowed down and treated with "a canyon load of reverb".
A lot of that album reflected Bono's feelings coming back from El Salvador and the Conspiracy of Hope tour and seeing the brutal face of US foreign policy."
[33] The song begins with the sound of rain hitting a roof, which fades in over the first fourteen seconds alongside the bass and a processed drum loop beat by Mullen which reverberates in the background.
The harmony gradually grows in volume until 4:33, at which point the song enters into a coda; the keyboards come to a finish and the guitar returns to playing A notes before fading over the next eight seconds alongside the bass.
[19] Eno used a piano as a percussive instrument and mixed the result with the drum loop through a PCM70 effects unit to create a sound that bassist Adam Clayton called "eerie and foreign and scary".
Speaking of his encounter with COMADRES in El Salvador and their impact on the song, he said, "There's no question in my mind of the Reagan Administration's involvement in backing the regime that is committing these atrocities.
"[14] Greg Garrett, an English professor at Baylor University, saw the song as an effort to "[respond] to growing interests in doing justice—and calling to attention American failures in that regard", noting that the regimes in South America had been supported by the United States because of their anti-communist positions, even though their tactics were in opposition to the democratic values that "America claims to champion around the world".
[4] Lisa Hand of the Sunday Independent noted the influence of America on the track, remarking, "[it] does not confine itself simply to the music, but also extends to some of the lyrics.
However, far from being a tribute to the star-spangled banner, the words highlight the political untruths and ambiguities which exist within the U.S. 'Mothers of the Disappeared' and 'Bullet the Blue Sky' both take a hard look at the American involvement in South America".
[35] U2 debuted "Mothers of the Disappeared" on 14 April 1987 in San Diego, California, on the first leg of the Joshua Tree Tour, where it closed the concert in place of the band's long-time finale "40".
[46][47] For the first time in 30 years, a full band arrangement of "Mothers of the Disappeared" returned to U2's live set for the Joshua Tree Tours 2017 and 2019.
[55] In Rolling Stone, Steve Pond said "'Mothers of the Disappeared' is built around desolate images of loss, but the setting is soothing and restorative—music of great sadness but also of unutterable compassion, acceptance and calm.
"[56] Lennox Samuels of The Dallas Morning News stated that there was "an ineffable sadness in Bono's vocals and images where 'Night hangs like a prisoner / Stretched over black and blue' ", calling it "a moving tribute" to people around the world who had lost loved ones to warfare and conflict.
"[57] Barbara Jaeger of The Bergen Record likened "Mothers of the Disappeared" to "New Year's Day" and "Pride (In the Name of Love)", stating that the band used all three to "stir political consciousness and to urge social commitment.
"[58] Thirteen years later, Ryan Jones, in his review of U2's 2000 album All That You Can't Leave Behind for the same publication, said the song "Peace on Earth" contained echoes of "Mothers of the Disappeared" in its lyrics and the tone of the instrumental prelude.
[62] Reflecting on the applause given to the Madres during the PopMart concert in Buenos Aires, the U2 magazine Propaganda called the result "about the most moving thing I've ever seen on a rock stage.
"[63] Following the televised concert in Chile, Bono said "it was amazing and confounding to discover that on our most 'pop' of tours some of the best shows were in political hotspots like Santiago, Sarajevo, Tel Aviv ... anywhere music meant more than entertainment".
"[39] U2's performance was later credited with inspiring a protest in the Chilean Parliament against Pinochet, who was in the process of becoming a Senator for life after relinquishing his position as head of the armed forces.