Problem: Background: Irving Fisher (February 27, 1867 - April 29, 1947) was an American economist, statistician, inventor, and Progressive social campaigner. He was one of the earliest American neoclassical economists, though his later work on debt deflation has been embraced by the Post-Keynesian school. Joseph Schumpeter described him as "the greatest economist the United States has ever produced", an assessment later repeated by James Tobin and Milton Friedman. Fisher made important contributions to utility theory and general equilibrium.
Context: Fisher was born in Saugerties, New York. His father was a teacher and a Congregational minister, who raised his son to believe he must be a useful member of society. Despite being raised in religious family, he later on became an atheist. As a child, he had remarkable mathematical ability and a flair for invention. A week after he was admitted to Yale College his father died, at age 53. Irving then supported his mother, brother, and himself, mainly by tutoring. He graduated first in his class with a B.A degree in 1888, having also been elected as a member of the Skull and Bones society. In 1891, Fisher received the first Ph.D. in economics granted by Yale. His faculty advisors were the theoretical physicist Willard Gibbs and the sociologist William Graham Sumner. As a student, Fisher had shown particular talent and inclination for mathematics, but he found that economics offered greater scope for his ambition and social concerns. His thesis, published by Yale in 1892 as Mathematical Investigations in the Theory of Value and Prices, was a rigorous development of the theory of general equilibrium. When he began writing the thesis, Fisher had not been aware that Leon Walras and his continental European disciples had already covered similar ground. Nonetheless, Fisher's work was a very significant contribution and was immediately recognized and praised as first-rate by such European masters as Francis Edgeworth. After graduating from Yale, Fisher studied in Berlin and Paris. From 1890 onward, he remained at Yale, first as a tutor, then after 1898 as a professor of political economy, and after 1935 as professor emeritus. He edited the Yale Review from 1896 to 1910 and was active in many learned societies, institutes, and welfare organizations. He was president of the American Economic Association in 1918. The American Mathematical Society selected him as its Gibbs Lecturer for 1929. A leading early proponent of econometrics, in 1930 he founded, with Ragnar Frisch and Charles F. Roos the Econometric Society, of which he was the first president. Fisher was a prolific writer, producing journalism as well as technical books and articles, and addressing various social issues surrounding of the First World War, the prosperous 1920s and the depressed 1930s. He made several practical inventions, the most notable of which was an "index visible filing system" which he patented in 1913 and sold to Kardex Rand (later Remington Rand) in 1925. This, and his subsequent stock investments, made him a wealthy man until his personal finances were badly hit by the Crash of 1929. Fisher was also an active social and health campaigner, as well as an advocate of vegetarianism, Prohibition, and eugenics. He died in New York City in 1947, at the age of 80.
Question: Was that successful?
Answer: producing journalism as well as technical books and articles, and addressing various social issues surrounding of the First World War,

Background: Earth Crisis is an American metalcore band from Syracuse, New York, active from 1989 until 2001, reuniting in 2007. Since 1993 the band's longest serving members are vocalist Karl Buechner, guitarist Scott Crouse, bassist Ian Edwards and drummer Dennis Merrick. Their third guitarist Erick Edwards joined the band in 1998. The band has released eight studio albums, three compilations, two live albums and six music videos.
Context: Earth Crisis had a huge impact on both the hardcore punk music and its ideals. MetalSucks said: "For anybody who was not in the hardcore scene back then, it is hard to describe the impact they had or how controversial they were. You either loved them or hated them for bringing both metal and veganism into the hardcore scene". Sociologist Ross Haenfler stated in The Vinyl Factory that "Earth Crisis became the face of straight edge throughout the 1990s" through "the convergence of 'radical' animal rights activism, a more aggressive 'metalcore' sound, and hardcore crews", becoming "one of the most controversial bands in the scene's history." Their albums Firestorm, Destroy the Machines and Gomorrah's Season Ends were particularly influential for the emerging metalcore genre. According to Andrew O'Neill, "Earth Crisis inspired a much more heavy metal sound in hardcore" and "the distinction between the two [genres] started to crumble" shortly after those records were released. To a large extent, Earth Crisis was responsible for the rising of vegan straight edge militancy in the mid- to late 90s, when veganism was rarely present in mainstream culture. Haenfler said that, while "earlier straight edge bands advocated vegetarianism - for example Youth of Today, Insted and Manliftingbanner", Earth Crisis "made animal rights (and environmentalism) central to the scene" as a "self-described 'vegan straight edge' band", "inspiring thousands of kids to give up animal products entirely." They also spawned many activists in the scene because their message "imparted the sense of urgency in a way that nothing else that ever come before had", according to Peter Daniel Young. Some of their songs went on to be considered by some as anthems, such as "Firestorm" for straight edge and "Ultramilitance" for eco-terrorists. They also drew major media attention, having been featured and interviewed by CNN, CBS and The New York Times, while lead singer Karl Buechner was invited to address the Congress about teens and substance abuse.
Question: how did they influence hardcore punk music
Answer:
O'Neill, "Earth Crisis inspired a much more heavy metal sound in hardcore"