Editing Frederick Copleston (section)

==Legacy==
{{Catholic philosophy}}
{{Further|A History of Philosophy (Copleston)}}
In addition to his influential multi-volume ''[[A History of Philosophy (Copleston)|History of Philosophy]]'' (1946–75),<ref name=":0"/> one of Copleston's most significant contributions to modern philosophy was his work on the theories of Saint [[Thomas Aquinas]]. He attempted to clarify Aquinas's [[Quinquae viae|Five Ways]] (in the ''[[Summa Theologica]]'') by making a distinction between ''[[in fieri]]'' causes and ''[[in esse]]'' causes. By doing so, Copleston makes clear that Aquinas wanted to put forth the concept of an omnipresent God rather than a being that could have disappeared after setting the chain of cause and effect into motion.<ref name="ashgate-hensel"/><ref name="abingdon"/>