Based on the provided information, what is the meaning of the term "posterity"?
Option 1: Posterity refers to the defense of the United States Constitution.
Option 2: Posterity means the offspring of one progenitor to the furthest generation, or all future generations.
Option 3: Posterity is a rare noun used to describe the offspring of a given progenitor.
Option 4: Posterity represents an age to come and is typically associated with financial debt.