by Marcus Honeysett:
Reformation stated knowledge is available because of revelation
Enlightenment removed God from the equation
Morality became based on utalitarianism
Christianity responded by creating liberalism
Naturalism brought feelings back
Science denied it which led to materialism
Materialism demanded to be purely personal - leisure versus work
World War One denied scientific materialism
The Great Depression led to World War Two and ended modernism
Communism failed to deliver
Truth claims were automatically suspect
Hence postmodernism was born.
So Trisha says, personal choice is the ultimate value.