Editing Demography (section)

==Population composition==
{{Unreferenced section|date=March 2025}}[[File:Population by broad age group projected to 2100, OWID.svg|thumb|upright=1.4|World demography by age composition from 1950 to 2100 (projected).<ref name="q917">{{cite web | title=Population by age group | website=Our World in Data | url=https://ourworldindata.org/grapher/population-by-age-group | access-date=26 January 2025}}</ref>]]
'''Population composition''' is the description of population defined by characteristics such as age, [[Race (classification of humans)|race]], sex or [[marital status]].  These descriptions can be necessary for understanding the [[social dynamics]] from historical and comparative research.  This data is often compared using a [[population pyramid]].

Population composition is also a very important part of historical research.  Information ranging back hundreds of years is not always worthwhile, because the numbers of people for which data are available may not provide the information that is important (such as [[population size]]).  Lack of information on the original data-collection procedures may prevent accurate evaluation of data quality.