I'd create a purely chaotic society where reality is functionally and psychologically indistinguishable from fantasy. A society where dualism is as fictional as everything else may be.

It will encourage everyone to live in the context of a self-defined role in a self-defined setting, either or both of which may change at any time without consequence.

Those who take on incompatible roles and live in incompatible settings will have to reconcile with each other--and whoever else gets pulled into the chaos by direct or indirect involvement--on entirely subjective bases because there is no measurable, objective standard to say that one expression is more or less real than any other.

Laws of matter, energy, space, time, and all of physics will yield to the collective will of selective perception.

There will only be two universal truths:

1. You only live once, as does everyone else.
2. The past cannot be undone.

Life and truth will be a tapestry woven by unchecked and equal expression of every individual's innate consciousness.