<P> There are three distinct definitions for all magical creatures given in the Fantastic Beasts book, which are "Beasts", "Beings" and "Spirits" (spirits being for ghosts) which were defined in 1811 by the British Minister for Magic . "Beings" are defined as "any creature that has sufficient intelligence to understand the laws of the magical community and to bear part of the responsibility in shaping those laws". All other creatures are therefore classified as "Beasts". </P> <P> Laws have been created surrounding the management of magical creatures, largely for the purposes of their protection, but also to protect wizards from dangerous creatures, govern ownership of certain creatures, and also to hide them from the Muggle world . In the Fantastic Beasts movie the political climate of the wizarding community at the time saw a blanket ban on possessing all magical creatures . </P> <P> The longstanding separation between the Wizarding and Muggle worlds in the Harry Potter universe has led many wizards to advocate keeping the two apart . This view has, in turn, led to a minority of British wizards seeing Muggles (and wizards of pure Muggle parentage) as untrustworthy, foolish, or, in extreme cases, racially inferior . The common practice of wizards marrying Muggles is viewed by such extremists as miscegenation, and they instead advocate maintaining a so - called "purity of blood". This was part of Lord Voldemort's ideology, and the Black family disowned anyone who married a half - blood or muggle . However, in Harry Potter and the Chamber of Secrets, Hagrid and Ron both state there is probably no such factor as "blood purity", with likely all Wizards finding marriages to Muggles on their family tree provided sufficient research . </P> <P> Pure - blood is the term applied to wizards and witches who have no Muggle blood, Muggles borns, or half - bloods at all in their family tree . They are the rarest of the three blood statuses, with J.K. Rowling saying 10% of the Wizarding community is made up of pure - bloods . Although technically pure - bloods have no Muggle ancestors, the small wizarding population means that "true" pure - bloods are rare or even non-existent, with most just ignoring or disowning the few Muggles in their family . Identified pure - blood families include the Blacks, the Crouches, the Fudges, the Gaunts (though that line died out before the beginning of Philosopher's Stone), the Lestranges, the Longbottoms, the Malfoys, and the Weasleys (but the most recent generation has had half - blood members). To maintain their blood purity, supremacist families have been known to inbreed into their own families by marrying their cousins, resulting in mental instability and violent natures . The Gaunts also displayed both tendencies by the time of the sixth book . </P>

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