I just received an email indicating that H-NET (Social Sciences and Humanities Online: "an independent, non-profit scholarly association that offers an open academic space for scholars, teachers, advanced students and related professionals") has started its own mastodon instance:

h-net.social: https://h-net.social/about/more

They say: "We hope to build a community of humanities and social science scholars committed to civil discourse and academic best practices."

#histodons #histodon