Each event is one step in how something spread: the first post, who picked it up, a jump to a new platform, press, the peak. Rows have a date, platform and actor, and 92% link to the source post. Two CSVs plus JSON, joined on case_id.

Download: https://howitspread.com/dataset?utm_source=reddit&utm_medium=social&utm_campaign=datasets

Caveat: everything in it went viral, so it can't tell you the odds of going viral. Timelines were compiled with LLM help; a verification column says how far each case was checked.