The correct answer is Shia and Sunni Islam. The factions split regarding their opinions on who should be the proper successor to Muhammad.
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He is also known for his discovery of the photoelectric effect, for which he won the Nobel Prize for Physics in 1921. Einstein developed a theory of special and general relativity, which helped to complicate and expand upon theories that had been put forth by Isaac Newton over 200 years prior.
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Despite such efforts, Walker's pamphlet had circulated widely by early 1830. Having failed to contain the Appeal, Southern officials criticized both the pamphlet and its author.
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