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The Saraiva-Cotegipe Law (Portuguese: Lei Saraiva-Cotegipe), also known as the Sexagenarian Law (Lei dos Sexagenários), officially Law No. 3,270 of 28 September 1885, was a Brazilian law enacted on 28 September 1885 that granted freedom to slaves aged 60 or older. Before the release, there would be mandatory and free service, which would be ...
Strauss and Howe define a social generation as the aggregate of all people born over a span of roughly 21 years or about the length of one phase of life: childhood, young adulthood, midlife, and old age. Generations are identified (from the first birthyear to last) by looking for cohort groups of this length that share three criteria.
Gender history is a sub-field of history and gender studies, which looks at the past from the perspective of gender. It is in many ways, an outgrowth of women's history . The discipline considers in what ways historical events and periodization impact women differently from men.
Mannheim defined a generation (note that some have suggested that the term cohort is more correct) to distinguish social generations from the kinship (family, blood-related generations) [2] as a group of individuals of similar ages whose members have experienced a noteworthy historical event within a set period of time.
In heterosexual sexual relationships, concepts of age disparity, including what defines an age disparity, have developed over time and vary among societies.Differences in age preferences for mates can stem from partner availability, gender roles, and evolutionary mating strategies, and age preferences in sexual partners may vary cross-culturally.
Timelines of world history; List of timelines; Chronology; See calendar and list of calendars for other groupings of years. See history, history by period, and periodization for different organizations of historical events. For earlier time periods, see Timeline of the Big Bang, Geologic time scale, Timeline of evolution, and Logarithmic timeline
Gender systems are the social structures that establish the number of genders and their associated gender roles in every society. A gender role is "everything that a person says and does to indicate to others or to the self the degree that one is either male, female, or androgynous.
ChronoZoom is a timeline for Big History being developed for the International Big History Association by Microsoft Research and University of California, Berkeley Asian Studies online: a timeline of major developments