*Note: Parricide as used by Thomas Jefferson here, is the sense of like the killing of one’s family, or brothers, and also probably a reference to any attempts to “kill” the new Democratic Republic – the people rule – system, back then.
The generation which is going off the stage has deserved well of mankind for the struggles it has made, and for having arrested the course of despotism which had overwhelmed the world for thousands and thousands of years.
If there seems to be danger that the ground they have gained will be lost again, that danger comes from the generation your contemporary. But that the enthusiasm which characterizes youth should lift its parricide hands against freedom and science would be such a monstrous phenomenon as I cannot place among possible things in this age and country.
– Thomas Jefferson; Letter to William Green Mumford (18 June 1799).