Svensk Ungdom. It is of course true that any group behavior is the result of individual traits, such as individual viruses suppressing the virulence of their neighbours, but the causes of phenotypes are rarely the causes of fitness differences. Species and higher levels. It remains controversial among biologists whether selection can operate at and above the level of species. Proponents of species selection include R. A. Fisher (1929); Sewall Wright (1956); Richard Lewontin (1970); Niles Eldredge & Stephen Jay Gould (1972); Steven M. Stanley (1975). Gould proposed that there exist macroevolutionary processes which shape evolution, not driven by the microevolutionary mechanisms of the 	Unit of selection
19736144	Modern Synthesis. If one views species as entities that replicate (speciate) and die (go extinct), then species could be subject to selection and thus could change their occurrence over geological time, much as heritable selected-for traits change theirs over generations. For evolution to be driven by species selection, differential success must be the result of selection upon species-intrinsic properties, rather than for properties of genes, cells, individuals, or populations within species. Such properties include, for example, population structure, their propensity to speciate, extinction rates, and geological persistence. While the fossil record shows differential persistence of species, examples of 	Unit of selection
19736145	species-intrinsic properties subject to natural selection have been much harder to document. Unit of selection A unit of selection is a biological entity within the hierarchy of biological organization (for example, an entity such as: a self-replicating molecule, a gene, a cell, an organism, a group, or a species) that is subject to natural selection. There is debate among evolutionary biologists about the extent to which evolution has been shaped by selective pressures acting at these different levels. There is debate over the relative importance of the units themselves. For instance, is it group or individual selection that 	Unit of selection
19736146	Svensk Ungdom Svensk Ungdom Swedish Youth (, abbr. SU) is a political youth organization (age between 14 and 30) in Finland. It is the youth wing of the Swedish People's Party of Finland. The organisation claims 2,500 members. It was founded in 1943. Svensk Ungdom is a member of the International Federation of Liberal Youth, European Liberal Youth and Nordic Center Youth. Organization. Until 2008 there was a separate student organisation, Liberala studerande LSK ("Liberal Students"), but since then it functions as a committee inside SU. Several previous chairpersons of SU, such as Astrid Thors for example, have later been ministers in 	Svensk Ungdom
19736147	the Finnish government. The newspaper of the organization is Liber". Svensk Ungdom's current board consists of eight people and is chaired by Frida Sigfrids. Svensk Ungdom's highest governing body is its annual congress (Swedish: "Kongressen"), which takes place every spring around April. It decides on the political guidelines and the organisation's board members. In 2020 the annual congress was moved to September due to the COVID-19 pandemic. For the same reason the annual congress of 2021 was held entirely virtually for the first time. Svensk Ungdom Swedish Youth (, abbr. SU) is a political youth organization (age between