Could you please give any example from a supposedly "progressive" speculative fiction story according to your definition (where the world starts out kinda shit but turns better by the end)?
I really am curious, for the moment I can't think of a good example.
Off the top of my head:
- Kim Stanley Robinson's Mars trilogy begins with an unterraformed Mars controlled by megacorps, and ends with a terraformed Mars which is an eco-socialist utopia.
- Frederick Pohl's legendary Gateway Series transitions across four books from a nightmare dystopia where humans risk taking one-way trips in alien spacecraft to make money to a post-scarcity utopia where even death has been conquered.
- I think most of the books of Cory Doctorow count. He's carved out a niche over the last 20 years as a "mundane SF" writer - constructing near-future timelines which explore the development of post-scarcity and human political transformation.
- Iain Bank's Culture series also likely counts, on the whole. In a lot of ways it's Star Trek like, focusing on a big multicultural, post-scarcity, post-capitalist polity. Utopia is never challenged, but various agents have "away missions" on the fringes, with manyof the novels focusing on improving things in a given corner of space.
- An alternate history example was the 1632-verse by Eric Flint. In it a small town from West Virginia gets transported into Germany in...well, 1632. The political earthquakes caused by this result in the enlightenment and liberalism happening decades earlier than they actually did.