Infringing upon (or encroachi...
Infringing upon (or encroaching) the right of a single person, we overthrow (or turn upside down) the whole order on which rest legal agreements; for if we break (or transgress or violate) the undertakings enter unto ("les engagements contract?s", Fr.), nothing assure that we will not break them, possibly ("?ventuellement", Fr.) in another.