Step-by-step explanation:
How they've defined freedom: In many countries of the world especially n western nations, freedom has been defined by citizens as having the ability to act as you like, to speak freely as you want, or even the ability to think a certain way.
How they've redefined or challenged concepts of freedom:
Many have redefined or challenged freedom for example by fighting to have what they often "an independent nation", one where the nation rules itself without external interference.
I think what actually inspires this quest for freedom terms from within the human mind or genealogical makeup; an inborn desire to have absolute domination of our lives irrespective of what our background, country, or culture may be.