Possibility.

That which is not,
but could be:

in the future, or
in a world as feasible as our own.
(perhaps more so?)

When is a possibility a reality?

It may not be a reality
unless - and until - it comes to be,

and, yet, might be a basis of reality,
decisions are made on assumptions
that a possibility
has high probability 
of becoming reality. 

I see kids playing 
and feel the expanding field
of possibility, 

and wonder when it starts to shrink,
to collapse?

When & why
does possibility die?