Generation in the context of "Biological life cycle"

A chronicle (Latin: chronica, from Greek χρονικά chroniká, from χρόνος, chrónos – "time") is a historical account of events arranged in chronological order, as in a timeline. Typically, equal weight is given for historically important events and local events, the purpose being the recording of events that occurred, seen from the perspective of the chronicler. A chronicle which traces world history is a universal chronicle. This is in contrast to a narrative or history, in which an author chooses events to interpret and analyze and excludes those the author does not consider important or relevant.

The information sources for chronicles vary. Some are written from the chronicler's direct knowledge, others from witnesses or participants in events, still others are accounts passed down from generation to generation by oral tradition. Some used written material, such as charters, letters, and earlier chronicles. Still others are tales of unknown origin that have mythical status. Copyists also changed chronicles in creative copying, making corrections or in updating or continuing a chronicle with information not available to the original chronicler. Determining the reliability of particular chronicles is important to historians.

Cultural identity is a part of a person's identity, or their self-conception and self-perception, and is related to nationality, ethnicity, religion, social class, generation, locality, gender, or any kind of social group that has its own distinct culture. In this way, cultural identity is both characteristic of the individual but also of the culturally identical group of members sharing the same cultural identity or upbringing. Cultural identity is an unfixed process that is continually evolving within the discourses of social, cultural, and historical experiences. Some people undergo more cultural identity changes as opposed to others, those who change less often have a clear cultural identity. This means that they have a dynamic yet stable integration of their culture.

There are three pieces that make up a person's cultural identity: cultural knowledge, category label, and social connections. Cultural knowledge refers to a person's connection to their identity through understanding their culture's core characteristics. Category label refers to a person's connection to their identity through indirect membership of said culture. Social connections refers to a person's connection to their identity through their social relationships. Cultural identity is developed through a series of steps. First, a person comes to understand a culture through being immersed in those values, beliefs, and practices. Second, the person then identifies as a member of that culture dependent on their rank within that community. Third, they develop relationships such as immediate family, close friends, coworkers, and neighbors.

The chronology of the Bible is an elaborate system of lifespans, "generations", and other means by which the Masoretic Hebrew Bible (the text of the Bible most commonly in use today) measures the passage of events from the creation to around 164 BCE (the year of the re-dedication of the Second Temple). It was theological in intent, not historical in the modern sense, and functions as an implied prophecy whose key lies in the identification of the final event. The passage of time is measured initially by adding the ages of the Patriarchs at the birth of their firstborn sons, later through express statements, and later still by the synchronised reigns of the kings of Israel and Judah.

The chronology is highly schematic, marking out a world cycle of 4,000 years. The Exodus takes place in the year A.M. 2666 (Anno Mundi, years since the creation of the world), exactly two-thirds of the way through the 4,000-year period: the construction of Solomon's Temple commences 480 years afterward—12 generations of 40 years each—and 430 years pass between the building of Solomon's Temple and its destruction during the siege of Jerusalem. The 50 years between the destruction of the Temple and the "Decree of Cyrus" and end of the Babylonian Exile, added to the 430 years for which the Temple stood, produces another symmetrical period of 480 years. The 374 years between the Edict of Cyrus and the re-dedication of the Second Temple by the Maccabees complete the 4,000-year cycle.

Sub-replacement fertility is a total fertility rate (TFR) that (if sustained) leads to each new generation being less populous than the older, previous one in a given area. The United Nations Population Division defines sub-replacement fertility as any rate below approximately 2.1 children born per woman of childbearing age, but the threshold can be as high as 3.4 in some developing countries because of higher mortality rates. Taken globally, the total fertility rate at replacement was 2.33 children per woman in 2003. This can be "translated" as 2 children per woman to replace the parents, plus a "third of a child" to make up for the higher probability of males born and mortality prior to the end of a person's fertile life. In 2023, the global average fertility rate was around 2.2 children born per woman.

Replacement-level fertility in terms of the net reproduction rate (NRR) is exactly one, because the NRR takes both mortality rates and sex ratios at birth into account.

A parent is either the progenitor of a child or, in humans, it can refer to a caregiver or legal guardian, generally called an adoptive parent or step-parent. Parents who are progenitors are first-degree relatives and have 50% genetic meet. A female can also become a parent through surrogacy. Some parents may be adoptive parents, who nurture and raise an offspring, but are not related to the child. Orphans without adoptive parents can be raised by their grandparents or other family members.

A parent can also be elaborated as an ancestor removed one generation. With recent medical advances, it is possible to have more than two biological parents. Examples of third biological parents include instances involving surrogacy or a third person who has provided DNA samples during an assisted reproductive procedure that has altered the recipients' genetic material.

Grandparents, individually known as grandmother and grandfather, or Grandma and Grandpa, are the parents of a person's father or mother – paternal or maternal. Every sexually reproducing living organism who is not a genetic chimera has a maximum of four genetic grandparents, eight genetic great-grandparents, sixteen genetic great-great-grandparents, thirty-two genetic great-great-great-grandparents, sixty-four genetic great-great-great-great-grandparents, etc. In the history of modern humanity, around 30,000 years ago, the number of modern humans who lived to be a grandparent increased. It is not known for certain what spurred this increase in longevity, but it is generally believed that a key consequence of three generations being alive together was the preservation of information which could otherwise have been lost; an example of this important information might have been where to find water in times of drought.

In cases where parents are unwilling or unable to provide adequate care for their children (e.g., financial obstacles, marriage problems, illness or death), grandparents often take on the role of primary caregivers. Even when this is not the case, and particularly in traditional cultures, grandparents often have a direct and clear role in relation to the raising, care and nurture of children. Grandparents are second-degree relatives to their grandchildren and share 25% genetic overlap.

Housing inequality is a disparity in the quality of housing in a society which is a form of economic inequality. The right to housing is recognized by many national constitutions, and the lack of adequate housing can have adverse consequences for an individual or a family. The term may apply regionally (across a geographic area), temporally (between one generation and the next) or culturally (between groups with different racial or social backgrounds). Housing inequality is directly related to racial, social, income and wealth inequality. It is often the result of market forces, discrimination and segregation.

It is also a cause and an effect of poverty. Residential inequality is especially relevant when considering Amartya Sen's definition of poverty as "the deprivation of core capabilities".

Supremacism is the belief that a certain group of people is superior to, and should have authority over, all others. The presumed superior group can be defined by various characteristics, including age, sex, race, ethnicity, religion, sexual orientation, language, social class, ideology, nationality, culture, generation, or any other human attribute.