We have also come to realize that no problem ever exists in complete isolation. Every problem interacts with other problems and is therefore part of a set of interrelated problems, a system of problems I choose to call such a system a mess problems... Furthermore solutions to most problems produce other problems... a financial problem, a maintenance problem, and conflict among family members for its use.
p. 21 as cited in: Frederick M. Zimmerman (2011) From Riches to Rags at a Time of Prosperity, p. 12. - Redesigning the future, 1974