Some context: Robert Schumann (; 8 June 1810 - 29 July 1856) was a German composer and an influential music critic. He is widely regarded as one of the greatest composers of the Romantic era. Schumann left the study of law, intending to pursue a career as a virtuoso pianist. He had been assured by his teacher Friedrich Wieck, a German pianist, that he could become the finest pianist in Europe, but a hand injury ended this dream.
During Eastertide 1830, he heard the Italian violinist, violist, guitarist, and composer Niccolo Paganini play in Frankfurt. In July he wrote to his mother, "My whole life has been a struggle between Poetry and Prose, or call it Music and Law." By Christmas he was back in Leipzig, at age 20 taking piano lessons from his old master Friedrich Wieck, who assured him that he would be a successful concert pianist after a few years' study with him.  During his studies with Wieck, it has been claimed that Schumann permanently injured a finger on his right hand. Wieck claimed that Schumann damaged his finger by the use of a mechanical device designed to strengthen the weakest fingers, a device which held back one finger while he exercised the others. This claim has been discredited by Clara Schumann, who said that the disability was not due to a mechanical device, and Robert Schumann himself refers to it as "an affliction of the whole hand". Some have argued that, as the disability appeared to have been chronic and have affected the hand, and not just a finger, it was unlikely to have been caused by a finger strengthening device.  Schumann abandoned the idea of a concert career and devoted himself instead to composition. To this end he began a study of music theory under Heinrich Dorn, a German composer six years his senior and, at that time, conductor of the Leipzig Opera. About this time Schumann considered composing an opera on the subject of Hamlet.
Why did he abandon the idea of a concert career?
A: During his studies with Wieck, it has been claimed that Schumann permanently injured a finger on his right hand.
Some context: Enrique Miguel Iglesias Preysler (; Spanish pronunciation: [en'rike mi'gel i'glesjas 'preizler]; born 8 May 1975) is a Spanish singer, songwriter, actor and record producer. He is widely regarded as the King of Latin Pop.
In 2002, Iglesias decided to release a fourth Spanish-language album titled Quizas (Perhaps). A more polished musical production than his previous Spanish albums and containing more introspective songs, the album's title track is a song about the strained relationship Iglesias has with his famous father.  The album debuted at number twelve on the Billboard 200 albums chart, the highest placement of a Spanish language album on the chart at that period. Quizas sold a million copies in a week, making it the fastest-selling album in Spanish in five years. The three singles released from the album all ended up topping the Latin chart, giving Iglesias a total of sixteen number ones on the chart. He currently holds the record for the most number one singles on Billboard's Latin Chart. His last single from the album, "Para Que La Vida", reached a million spins on U.S. radio, the only Spanish language song to do so.  The video to the song "Quizas" was the first Spanish language music video to be added to the selection on one of MTV's popular shows, Total Request Live. Iglesias performed the song on The Tonight Show with Jay Leno, becoming the first to sing a Spanish song on the show, and opening doors for other artists such as Ricky Martin, Juanes and Jorge Drexler to perform their Spanish material. Iglesias included songs from Quizas in his "Don't Turn Off the Lights Tour", and the album went on to win the Latin Grammy Award for Best Pop Vocal Album.  By 2003 Iglesias released his seventh album, which he called 7, the second to be co-written by Iglesias. Among its more 1980s-inspired material, it features the song "Roamer", which he wrote with his friend and longtime guitarist, Tony Bruno. The CD also contained the song "Be Yourself", a song about independence (the chorus talks about how Iglesias' own parents did not believe he'd ever succeed in his singing career). The first single was the song "Addicted", and was followed closely by a remix of the song "Not in Love", featuring Kelis.  With this album, Iglesias went on his biggest world tour to date. The highly publicised tour started with twelve shows in the United States ending with Iglesias playing at Houston Rodeo and continued on to several countries, most of which he'd never previously visited playing to sold-out arenas and stadiums in Australia, India, Egypt and Singapore before ending his tour in South Africa.
Did he have any music videos?
A: 
Some context: Richard Charles "Dick" Lewontin (born March 29, 1929) is an American evolutionary biologist, mathematician, geneticist, and social commentator. A leader in developing the mathematical basis of population genetics and evolutionary theory, he pioneered the application of techniques from molecular biology, such as gel electrophoresis, to questions of genetic variation and evolution. In a pair of seminal 1966 papers co-authored with J.L. Hubby in the journal Genetics, Lewontin helped set the stage for the modern field of molecular evolution. In 1979 he and Stephen Jay Gould introduced the term "spandrel" into evolutionary theory.
Along with others, such as Gould, Lewontin has been a persistent critic of some themes in neo-Darwinism. Specifically, he has criticised proponents of sociobiology and evolutionary psychology such as Edward O. Wilson and Richard Dawkins, who attempt to explain animal behaviour and social structures in terms of evolutionary advantage or strategy. He and others criticize this approach when applied to humans, as he sees it as genetic determinism. In his writing, Lewontin suggests a more nuanced view of evolution is needed, which requires a more careful understanding of the context of the whole organism as well as the environment.  Such concerns about what he views as the oversimplification of genetics has led Lewontin to be a frequent participant in debates, and an active life as a public intellectual. He has lectured widely to promote his views on evolutionary biology and science. In books such as Not in Our Genes (co-authored with Steven Rose and Leon J. Kamin) and numerous articles, Lewontin has questioned much of the claimed heritability of human behavioral traits, such as intelligence as measured by IQ tests.  Some academics have criticized him for rejecting sociobiology for non-scientific reasons. Edward Wilson (1995) suggested that Lewontin's political beliefs affected his scientific view. Robert Trivers described Lewontin as "...a man with great talents who often wasted them on foolishness, on preening and showing off, on shallow political thinking and on useless philosophical rumination while limiting his genetic work by assumptions congenial to his politics." Lewontin has at times identified himself as Marxist, and admitted that his ideological views have affected his scientific work (Levins and Lewontin 1985). Others such as Kitcher (1985) have countered that Lewontin's criticisms of sociobiology are genuine scientific concerns about the discipline. He wrote that attacking Lewontin's motives amounts to an ad hominem argument.
What kind of impact did his paper have?
A:
He has lectured widely to promote his views on evolutionary biology and science.