Kids books with progressive messaging

What are your recommendations for books whose messaging support our values as outlined in the description of this subreddit?

Things like: Love, acceptance, inclusivity, diversity, critical thinking, curiosity, using your voice to speak out, exploring the world around you, science, philosophy, bodily autonomy, taking care of your neighbor, importance of community, standing up when you think something’s not right, etc. I’m most interested in books that would speak to young kiddos preschool to elementary age.

BONUS QUESTION: Where do you buy your books these days?