There are still way too many people who believe that Mastodon was created as a reaction to Musk's planned (or even actual) takeover of Twitter, and if they find out there's more to the Fediverse than Mastodon, everything else was created even later.
Acutal reverse timeline, to whom it may concern:
Musk bought Twitter in 2022.
ActivityPub was acknowledged a standard in 2018.
Mastodon is from 2016.
Hubzilla is from 2012.
Friendica is from 2010. Actually several months older than Diaspora*.
As early as 2008, we already had something called StatusNet with a huge instance named identi.ca.
Jupiter Rowland @jupiter_rowland@hub (Mastodon)