Complex sentence: The field of sociology itself and sociological theory by extension is relatively new, dating back to the 18th and 19th centuries (see history of sociology), it is closely tied to a much older field of social sciences (and social theory) in general.
Split into simpler sentences: The field of sociology itself and sociological theory by extension is relatively new. Dating back to the 18th and 19th centuries (see history of sociology), it is closely tied to a much older field of social sciences (and social theory) in general.