"Liberté, Egalité, Fraternité"

I'm inclined to regard the words of this triple motto as 'false friends' nowadays.
It seems to be clear, but is not, what be meant by the well known words.
Instead of this, in 18th century France, 'liberté' was not a battle cry for more freedom of decision but a claim against serfdom: the fact, that most people were OWNED by other people. In other words, it was the battle cry against slavery.
In the same way, 'égalité' pointed to the end of a society of estates (no more aristocracy but bourgeoisie - yet not including agricultural labourers nor housemaids, e.g.).
'Fraternité', as the perhaps most freemasonly determined concept of the triple, means not the same as Schiller's 'All humans become siblings' in his 'Ode to Joy' (1786).
In short, we have to fill the triple concept of Liberty, Equality and Fraternity with content - but this is not possible in regard to 'modern' aspects and to 'historical' aspects at the same time.