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So ideology archaically means the study of ideas according to Google, but in modern times it means a system of ideas particularly for politics or economics despite still ending in -ology. Casually ideologyology gets the point across, but is there a better word for the study of ideologies? I thought of metaideology, but I think the meaning might not be clear.
Example sentence: "There is a book about < insert word >"
There is the term political economy:
Political economy most commonly refers to interdisciplinary studies drawing upon economics, sociology, and political science in explaining how political institutions, the political environment, and the economic system — capitalist, socialist, communists, or mixed — influence each other.
Wikipedia
If you want a broader term that includes more disciplines, you can consider social science:
Social science is a major category of academic disciplines, concerned with society and the relationships among individuals within a society. It in turn has many branches, each of which is considered a "social science". The main social sciences include economics, political science, human geography, demography, and sociology.
Wikipedia
Ideologies such as Marxism, Communism, Keynsian economics, Capitalism etc., are all theories. When you study theory itself, you are undertaking Meta-theory. This is quite a common term for what you are describing, and I have sat and taken modules at university in Meta-theory.
