This paper defines hazard and describes how costs inherent in environmental hazards, particularly those producing the recent urban core riots, are assessed and distributed by current and alternative insurance pricing systems. The concept of socializing risks beyond the control of the insured is explored and the characteristics of a completely effective socialization mechanism are enumerated. Rating recognition of environmental hazards under current class, schedule, and schedule excess rating plans, substandard filings, and surplus lines rating are reviewed, with particular attention addressed to pricing under FAIR Plans and the civil disorder premium loading. The loading is described as a current example of risk socialization with some private equity features that have posed several unanswered questions. The riots and civil disorders that have plagued our cities since 1965 have led to Andrew F. Whitman, Ph.D., J.D., C.L.U., C.P.C.U., is Associate Professor of Insurance in the University of Minnesota and a member of the Minnesota Bar. Dr. Whitman has contributed articles of this Journal and the C.P.C.U. Annals. C. Arthur Williams, Jr., Ph.D., is Professor of Economics and Insurance in the University of Minnesota. Dr. Williams, a past President of A.R.I.A., is the author or co-author of several books and articles. This paper, which was presented at the 1969 Annual Meeting of A.R.I.A., was made possible by the generous cooperation of many persons, including the following who supplied important information in response to the authors' inquiries: W. C. Freitag, Manager, Fire Underwriters Inspection Bureau, Berton Heaton, Assistant Manager, Rating Division, Minnesota State Insurance Department, C. R. Hall, Assistant Secretary, National Association of Independent Insurers, K. H. Parker, General Manager Fire Insurance Research and Actuarial Association, W. H. Rodda, Manager, Transportation Insurance Rating Bureau, LeRoy Simon, General Manager, National Insurance Actuarial and Statistical Association, Kenneth 0. Smith, Manager, New York Fire Insurance Rating Organization, J. T. Sorensen, Manager, Fire Insurance Research and Actuarial Association, and William S. Gibson, Assistant Director, State of Illinois Department of Insurance. This project was funded through a special legislative appropriation to the Bureau of Business Research, Graduate School of Business Administration, University of Minnesota. some significant changes in property insurance rating philosophies and practices. Because they have sustained increased property losses due to these riots and because they fear that this higher level of riot activity will continue, insurers have sought more premium dollars to prevent underwriting losses in the future. However, public pressures and practical limitations have prohibited them from collecting t-he premiums they consider adequate to insure property owners in riot-affected areas. Consequently insurers have re-examined their rating philosophies, which were based primarily on private equity concepts, and have given new emphasis to the socialization of risk associated with environmental hazards. This paper (1) examines the socialization of risk and how this might be achieved, (2) describes how current fire and extended coverage insurance pricing methods allocate the cost of environmental hazards among insureds and company owners, and (3) analyzes the special riot and civil disorder charges that insurers have added to cover these newly discovered sources of loss. In another article the authors will present more specific in-