I hes­i­tate to define it, and there­fore lim­it it, for the thou­sands now explor­ing its pos­si­bil­i­ties. Let’s ten­ta­tive­ly call it a spec­u­la­tive move­ment: a col­lab­o­ra­tive effort to imag­ine and design a world of pros­per­i­ty, peace, sus­tain­abil­i­ty and beau­ty, achiev­able with what we have from where we are. Only in the twen­ty-teens could a series of social media sketch­es spark such an ambi­tious activist agen­da — not to men­tion a lit­er­ary genre that has rabid fans but has yet to pro­duce any lit­er­a­ture.