Generation

==Familial generation<!--'Familial generation' redirects here-->==
[[File:Lynch Armenia Five generations.png|thumb|left|Five generations of one [[Armenians|Armenian]] family—a child with her mother, grandmother, great-grandmother and great-great-grandmother. (photograph dated from book published in 1901)]]
[[File:Orthodox priest family.jpg|thumb|Three generations of an [[Clerical marriage|Eastern Orthodox priest family]] from [[Jerusalem]], {{circa|1893}}]]
A '''familial generation'''<!--boldface per WP:R#PLA--> is a group of living beings constituting a single step in the line of descent from an ancestor.<ref>{{cite web|title=Generation|url=http://www.merriam-webster.com/dictionary/generation|publisher=Miriam-Webster|access-date=22 July 2013|archive-date=5 September 2013|archive-url=https://web.archive.org/web/20130905111349/http://www.merriam-webster.com/dictionary/generation|url-status=live}}</ref> In developed nations the [[generation time|average familial generation length]] is in the high 20s and has even reached 30 years in some nations.<ref name="OECD">Organisation for Economic Co-operation and Development (OECD) Social Policy Division [http://www.oecd.org/dataoecd/62/49/41919586.pdf] {{Webarchive|url=https://web.archive.org/web/20180302044722/http://www.oecd.org/dataoecd/62/49/41919586.pdf|date=2 March 2018}} SF2.3: Mean age of mothers at first childbirth. Retrieved 15 April 2011.</ref> Factors such as greater [[industrialisation]] and demand for cheap labour, [[urbanisation]], delayed first [[pregnancy]] and a greater uncertainty in both employment income and relationship stability have all contributed to the increase of the generation length from the late 18th century to the present. These changes can be attributed to social factors, such as [[GDP]] and state policy, [[globalization]], automation, and related individual-level variables, particularly a woman's educational attainment.<ref>{{cite web|last1=Bedasso|first1=Biniam Egu|url=http://www.uneca.org/acgs/mdgs/Education_Empirical_report.pdf |title=Investing in education as a means and as an end: exploring the microfoundations of the MDGs |access-date=6 February 2016 |url-status=dead |archive-url=https://web.archive.org/web/20120601030316/http://www.uneca.org/acgs/mdgs/Education_Empirical_report.pdf |archive-date=1 June 2012 |df=dmy |date=March 2008 |publisher=United Nations Economic Commission for Africa}}</ref> Conversely, in less-developed nations, generation length has changed little and remains in the low 20s.<ref name="OECD"/><ref name="NCHS">Mathews TJ, Hamilton BE. [https://www.cdc.gov/nchs/data/databriefs/db21.pdf] {{Webarchive|url=https://web.archive.org/web/20171125130852/https://www.cdc.gov/nchs/data/databriefs/db21.pdf|date=25 November 2017}} Delayed childbearing: More women are having their first child later in life. NCHS data brief, no 21. Hyattsville, MD: National Center for Health Statistics. 2009. Retrieved 14 April 2011.</ref>

An [[Intergenerational conflict|intergenerational rift]] in the [[nuclear family]], between the parents and [[Siblings|two or more of their children]], is one of several possible [[Dysfunctional family#Dynamical|dynamics of a dysfunctional family]]. Coalitions in families are subsystems within families with more rigid boundaries and are thought to be a sign of family dysfunction.<ref>{{Cite journal |pmc = 3127252|year = 2011|last1 = Whiteman|first1 = S. D.|title = Theoretical Perspectives on Sibling Relationships|journal = Journal of Family Theory & Review|volume = 3|issue = 2|pages = 124–139|last2 = McHale|first2 = S. M.|last3 = Soli|first3 = A.|pmid = 21731581|doi = 10.1111/j.1756-2589.2011.00087.x}}</ref>