In 1966 this organization formed and set agenda for the feminist movement (4words)

why was the national assembly formed by the third estate?

the estates-general had not been assembled since 1614, and its deputies drew up long lists of grievances and called for sweeping political and social reforms. the third estate, which had the most representatives, declared itself the national assembly and took an oath to force a new constitution on the king.

which time period is this? or is this story fictional, i'm going to need more info to answer this question