There is a common bond which spiritually unites these people, which is that attitude of cultural radicalism carried over from the 1960's. Theirs is an anti-American credo, which abhors American political and governmental institutions and this nation's capitalistic economy. Their value system is at war with the Judeo-Christian tradition upon which this country was founded and is centered in secular humanism and moral relativism.
Note the connections with Marx, inasmuch as modern Utopians are "anti-capitalistic", and the connections with Rousseau, inasmuch as they desire to destroy our culture and replace it with their envisioned ideal culture. Observe also the desire to destroy humanism, as we know it in Erasmus and T.S. Elliot, as we see it in Da Vinci and Michelangelo, as we hear it in Bach and Haydn - to be replaced by their idealized "secular humanism," a world view of mechanized determinism which denies that humans can make meaningful or significant choices in life.
Theirs is the me generation, which seeks immediate gratification, presumably because there is no spiritual tomorrow. Their God is not spiritual or personal. Their God is in every fiber of nature and is impersonal. He is just as much a part of the plant and animal kingdom as He is a part of the human soul; thus, their pantheistic devotion to animals and the environment. Their God did not give them dominion over nature and the animal kingdom, positioning them at the top rung on the hierarchy of creation.
If one regards all of nature as God, one is then obliged to view a human being as nothing special. Despite their talk of "human rights," Utopians essentially believe that a human is no more special than a flower or a fish.
As their emphasis is on this world, they cling to the belief that man is morally perfectible and that Utopia on earth is achievable.
In various forms, this drive toward Utopia needs the coercive force of an authoritative government to accomplish its social engineering. These idealists believe that, if only everyone will cooperate with their plans, a perfect society is right around the corner. Yet not everyone will cooperate, and they feel themselves justified in forcing compliance from those unwilling citizens who cling to their personal freedom. Surely, the Utopians think, it is worth it to temporarily remove the rights of a few people in order to create a perfect society for everyone. From this seemingly innocent sentiment, it is but a few short steps to using the guillotine to execute thousands of French women and children, because they didn't seem enthusiastic enough about the latest instructions from the revolutionary government. Thus ever ends Utopian hopes.