1. That differences between individuals or groups of individuals is better explained by "nurture" rather than "nature."
2. That society is constructed in such a way that it benefits certain traits over others. Some benefits may be superficial- ex: whites are the most attractive. Others may be structural- ex: programmers make more than teachers because programming produces more value because capital is invested more in things that programming affects rather than things that teaching affects. This contributes to men making more money than women.
3. That it is possible to reconstruct society to avoid creating "nurture" originating differences between individuals and groups of individuals. Ex: Men are more likely to hit on women than women are to hit on men. Perhaps by teaching men to be less aggressive, this disparity will be avoided.
4. That society's structure is not a necessary development but rather an accidental one. Ex: America eats a lot of meat, but this only happened because the government subsidized corn, which made feed for cattle very cheap.
5. That society may be reconstructed in such a way that structural benefits are not present. Ex: Perhaps we should defund corn subsides and encourage people to eat bugs and plants rather than large animals?
6. That the reconstructed society will be "better." Better probably being less income inequality, more freedom, less violence, suffering, etc.
7. That when someone does something "wrong" in society, they may be "excused" since their behavior was nurtured, and they didn't know better. Additionally, since society is arbitrarily constructed, perhaps the "wrong" they committed is not an actual wrong. Ex: a student arrives late to class and receives a 0 for attendence. Perhaps this attendence should be excused because they come from a society where timeliness is not needed? Perhaps we should reconstruct society to make timeliness in class unnecessary?
8. That there is more than one right answer or truth. Ex: "Some physicists subscribe to the Many Worlds Theory. Others subscribe to the C[sic: I've forgotten the alternative] Iterpretation. Both can be right and there is no real need to reduce them down to a single correct answer."
While I certainly see how these individual things could be true, I don't see how any of these individual things are proven to be true. Further, while people seem to operate politically using these ideas under some grand unified model of progressivism, I don't see any evidence that the grand model will ever be realized.