<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">systems theory</topic></authority><related type="broader"><topic>historical, theoretical, and critical concepts</topic></related><variant type="other"><topic>social systems theory</topic></variant> <note xml:lang="en"><![CDATA[ The study of society as a complex arrangement of elements, including individuals and their beliefs, as they relate to a whole (e.g., a country). ]]></note></mads>