Why is Libra the only non living zodiac sign ⚖️ ?

Ow, where's my crypt, i'll go sleep until evening )))

Astrology is ALL symbolism. Every sign refers to a noticeable characteristic of the people born under the sign.

The scales are a reference to Libra's ability to weigh both sides of an argument. (Libras are also known for being indecisive.)

Libra is considered a human sign, though.  It is a man made object.  So why does there have to be more than one, or any? 

Because we are dead inside.

Because they are unique.

The signs are based on the connect the dots Greco-Roman constellations. Eighty-eight official constellations. The vast majority are animals, humans, and myth based creatures.

At one time Libra was the claws of Scorpius, the real name of the constellation.