Are all abelian groups simple?

Could you clarify for me if all abelian groups are necessarily simple? I understand that an abelian group possesses the property of commutativity, meaning that the order in which elements are combined does not affect the result. However, I'm unsure if this characteristic alone implies that such groups are simple, i.e., having no non-trivial proper subgroups. Could you elaborate on the relationship between the commutative nature of abelian groups and their simplicity, or perhaps provide an example that illustrates whether or not all abelian groups are simple?