Possible Worlds

The notion 'Possible World' came to Philosophical prominence with Leibniz' assertion 'This is the best of all possible worlds', famously ridiculed by Voltaire. For Leibniz, it is a Theological concept, referring to the capacity of God's Intellect to consider alternatives before deciding, on the basis of 'Bestness', which World to create. In contemporary Philosophy, the term is most prominent in a branch of Analytic Logic, Modal Logic, which shares few of Leibniz' concerns. Even though Modal Logic is typically presented as a Theory of 'Possible Worlds', its main objective is to define Analytic Logic's useful operator Necessity, which it ultimately equates to the classic Logical quantificational notion Universality, i. e. 'in all cases'. Possibility is, correspondingly quantificational Particularity, i. e. 'in some cases', whereas a 'World' is simply a set of entities. 'Bestness', unless it is implicitly defined as 'Necessity', is of no concern to this Modal Logic, and, that in the latter, the Actual World also qualifies as a Possible World, even trivializes the very concept of 'Modality'. In Evolvementalism, Actuality is what has become the case, Possibility is an option that could become the case, whereas Necessity applies only to some features within Actuality. In other words, what distinquishes Possibility from mere compresent alternality is its deliberative context, just as it was for Leibniz.