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  2. List of social movements - Wikipedia

    en.wikipedia.org/wiki/List_of_social_movements

    Social movements are groupings of individuals or organizations which focus on political or social issues.. This list excludes the following: Artistic movements: see list of art movements.

  3. List of genocides - Wikipedia

    en.wikipedia.org/wiki/List_of_genocides

    Scholarship varies on the definition of genocide employed when analysing whether events are genocidal in nature. [2] The United Nations Genocide Convention, not always employed, defines genocide as "any of the following acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such: killing members of the group; causing serious bodily or ...

  4. Chronology - Wikipedia

    en.wikipedia.org/wiki/Chronology

    Chronology (from Latin chronologia, from Ancient Greek χρόνος, chrónos, ' time '; and -λογία, -logia) [2] is the science of arranging events in their order of occurrence in time. Consider, for example, the use of a timeline or sequence of events. It is also "the determination of the actual temporal sequence of past events". [3]

  5. Historic recurrence - Wikipedia

    en.wikipedia.org/wiki/Historic_recurrence

    Historic recurrence is the repetition of similar events in history. [a] [b] The concept of historic recurrence has variously been applied to overall human history (e.g., to the rises and falls of empires), to repetitive patterns in the history of a given polity, and to any two specific events which bear a striking similarity. [4]

  6. Burnside problem - Wikipedia

    en.wikipedia.org/wiki/Burnside_problem

    Initial work pointed towards the affirmative answer. For example, if a group G is finitely generated and the order of each element of G is a divisor of 4, then G is finite. . Moreover, A. I. Kostrikin was able to prove in 1958 that among the finite groups with a given number of generators and a given prime exponent, there exists a largest o

  7. List of time periods - Wikipedia

    en.wikipedia.org/wiki/List_of_time_periods

    Ancient history – Aggregate of past events from the beginning of recorded human history and extending as far as the Early Middle Ages or the Postclassical Era. The span of recorded history is roughly five thousand years, beginning with the earliest linguistic records in the third millennium BC in Mesopotamia and Egypt .

  8. Social group - Wikipedia

    en.wikipedia.org/wiki/Social_group

    In the social sciences, a social group is defined as two or more people who interact with one another, share similar characteristics, and collectively have a sense of unity. [1] [2] Regardless, social groups come in a myriad of sizes and varieties. For example, a society can be viewed as a large social group.

  9. Timelines of modern history - Wikipedia

    en.wikipedia.org/wiki/Timelines_of_modern_history

    An Encyclopedia of World History (5th ed. 1973); highly detailed outline of events online free Morris, Richard B. and Graham W. Irwin, eds. Harper Encyclopedia of the Modern World: A Concise Reference History from 1760 to the Present (1970) online