The '''cosmological argument''' or first cause argument "is a philosophical argument for the existence of God which says that everything has a cause, therefore working back in time there must have been a first cause. This first cause was itself uncaused. The argument is that this first cause was by what we call [[God]]"<ref>[http://www.allaboutphilosophy.org/cosmological-argument.htm Cosmological argument], AllAboutPhilosophy</ref> It is based on the principle of [[Cause and effect]]. However, not all effects have causes, leading some atheists to argue that the universe does not necessarily require a cause.
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The '''cosmological argument''' or first cause argument "is a philosophical argument for the existence of God which explains that everything has a cause, that there must have been a first cause, and that this first cause was itself uncaused."<ref>[http://www.allaboutphilosophy.org/cosmological-argument.htm Cosmological argument], AllAboutPhilosophy</ref>