Wesley N. Hohfeld (wiki 
) wrote a landmark essay in 1913 where he contributed to the reinterpretation of property and property law: Fundamental Legal Conceptions as Applied in Judicial Reasoning;
W.N. Hohfeld source
Therein he focuses on "jural relations" among people. Hohfeld more generally, appears to be the scholarly basis of claims about property rights being fundamentally relational, and not focused on the thing itself. Thus, he invites to see the state's role in enforcing those relations embedded in property rights.
# Quotes from the Hohfeld-essay
At the very outset it seems necessary to emphasize portance of differentiating purely legal relations from the p and mental facts that call such relation. (p.20)
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# See also
# Sources
Wesley N. Hohfeld (1913): Some Fundamental Legal Conceptions as Applied in Judicial Reasoning, The Yale Law Journal, Vol. 23, No. 1 (Nov., 1913), pp. 16-59pdf
Barbara H. Fried (1998): The Progressive Assault on Laissez-Faire: Robert Hale and the First Law and Economics Movement," Harvard U. Press.