I heard this term on TV last night from a Professor of Sociology at Harvard, in regard to the Jena 6 (sorry, I forget his name). By all accounts this concept has been used many times in the past to produce change in society, particularly in America.
The Women’s Christian Temperance Union used it in 1874, other temperance societies at the time sometimes added ‘consecrate’ to the list.
Women’s Clubs at the turn of the century used the motto to improve the lot of women and children.
The method was also used during the civil rights movement.
‘Educate, Agitate, Legislate!’ is exactly what we need to combat the religious strangle hold on government policies and laws. The general public needs to be Educated as to why we should have a secular government and complete separation of church and state. We need people to Agitate (thanks Richard Dawkins, Christopher Hitchens, PZ Myers, et al) to get the message out there. Lastly we need to Legislate to enshrine separation of church and state in our constitution.
Perhaps ‘Educate, Agitate, Legislate!’ should be the new catch phrase of all atheists? Not just for the separation of church and state in constitutions, but in respect to anything in which the religious sector gets some sort of preference or endorsement.