An only child is a person with no siblings, either biological or adopted. In a family with multiple offspring, first-borns, may be briefly considered only children and have a similar early family environment, but the term only child is generally applied only to those individuals who never have siblings. An only child, however, may have half-siblings or step-siblings who come along considerably late (after they reach their teens) and still be considered an only child. Children with much older siblings (generally ten or more years) may also have a similar family environment to only children.

Throughout history, only children were relatively uncommon. Faced with declining birth rates, birth control, inflation, and a larger demand for the workforce, more families began to raise only children. In recent years, the number of families in the United States, Europe, and Japan choosing to have one child has increased considerably since the 1940s, coinciding with achieving equality in the workforce. After the Korean War ended in 1953, the South Korean government suggested citizens each have one or two children to boost economic prosperity, which resulted in significantly lowered birth rates and a larger number of only children to the country. Since 1979, the one-child policy in mainland China has restricted most parents to having an only child, although it is subject to local relaxations and individual circumstances.

Steven John Wilson (born 3 November 1967) is an English musician, best known as the founder, lead guitarist, singer and songwriter of progressive rock band Porcupine Tree. He is involved in many other bands and musical projects both as musician and producer (including No-Man and Blackfield) and also maintains a solo career.

Wilson is a self-taught producer, audio engineer, guitar and keyboard player, playing other instruments as and where required (including bass guitar, concert harp, hammered dulcimer and flute).

He used to split his living time between Tel Aviv and London, England, but he no longer holds a permanent residence in Tel Aviv.

Born in Kingston upon Thames, London, England (but brought up in Hemel Hempstead, Hertfordshire, England from the age of 6)^{[citation needed]}, Wilson discovered his love for music around the age of 8. It began one Christmas when his parents bought presents for each other in the form of LPs. His father and mother received Pink Floyd's The Dark Side of the Moon and Donna Summer's Love to Love You Baby, respectively. The young Steven spent much of his childhood listening to these albums in "heavy rotation", as he once commented.

Clyde Jackson Browne (born October 9, 1948) is an American singer-songwriter and musician who has sold over 17 million albums in the United States alone.

Coming to prominence in the 1970s, Browne has written and recorded several notable songs throughout his career including "These Days", "The Pretender", "Running On Empty", "Lawyers in Love", "Doctor My Eyes", "Take It Easy", "For a Rocker", and "Somebody's Baby". In 2004, he was both inducted into the Rock and Roll Hall of Fame in Cleveland, Ohio, and bestowed an Honorary Doctorate of Music by Occidental College in Los Angeles, California.

Browne was born in Heidelberg, Germany, where his father, an American serviceman, was stationed. Browne's mother, Beatrice Amanda (née Dahl), was a Minnesota native of Norwegian ancestry. Browne has three siblings: Roberta "Berbie" Browne who was born in 1946 in Nuernberg, Germany (Nuremberg) and Edward Severin Browne who was born in 1949 in Frankfurt am Main, Germany. His younger sister, Gracie Browne, was born a number of years later. Browne moved to the Highland Park district of Los Angeles, California, at the age of 3 and in his teens began singing folk music in local venues like the Ash Grove and The Troubador Club. He attended Sunny Hills High School in Fullerton, California, graduating in 1966.

Francesca Battistelli (born May 18, 1985) is an American Christian musician from New York City, New York. She was originally an independent artist and had released an independent album, Just a Breath, in 2004. Her first studio album on Fervent Records, My Paper Heart, was released on July 22, 2008. Her first single, "I'm Letting Go", was released to radio stations in spring of 2008 and has charted on national Christian CHR charts since then. The song was the 16th most played song of 2008 on Christian radio stations according to R&R magazine. Battistelli received her first Grammy Award nomination in 2009, for Best Gospel Performance with her single, "Free to Be Me".

Battistelli was born on May 18, 1985 in New York City. She grew up in a musical family with both of her parents involved in musical theatre. "There was just something about live theater—especially musical theater—that has always resonated with me" she said. She "knew that she was going to spend her life performing" after seeing a performance of the musical The Secret Garden on Broadway at the age of six. "So I thought that was it. I was going to be Mary Lennox in The Secret Garden."

Modest Mouse is an American indie rock band based in Portland, Oregon. They were formed in 1993 in Issaquah, Washington, by singer/lyricist/guitarist Isaac Brock, drummer Jeremiah Green, and bassist Eric Judy. Since their 1996 debut album, This Is a Long Drive for Someone with Nothing to Think About, their lineup has centered around Brock, Green and Judy. Guitarist Johnny Marr (formerly of The Smiths) joined the band in May 2006, along with percussionist Joe Plummer (formerly of the Black Heart Procession) and multi-instrumentalist Tom Peloso, to work on the album We Were Dead Before the Ship Even Sank. Guitarist Jim Fairchild joined the band in February 2009. Their name is derived from a passage from the Virginia Woolf story "The Mark on the Wall" which reads, "I wish I could hit upon a pleasant track of thought, a track indirectly reflecting credit upon myself, for those are the pleasantest thoughts, and very frequent even in the minds of modest, mouse-coloured people, who believe genuinely that they dislike to hear their own praises."