Answer:
Language is the appropriate base for communication which is used to understand other's expression and makes others understand.Without communication,socialization is not possible and culture can't be transferred to new generation.
Voyager 2
On November 5, 2018, Voyager 2 officially left the solar system as it crossed the heliopause, the boundary that marks the end of the heliosphere and the beginning of interstellar space.
I believe the answer to your question is going to be
“Rule by a power-hungry leader”