What effect did the revolt of slaves led by Spartacus have on Rome?

First of all, Spartacus' rebellion gave the slaves of Rome another point of view on slavery. Being true that slaves were aware of freedom, they did not dare to defy Roman law. Even those who were enslaved in captivity during war, who most craved freedom did not find it possible to escape into freedom. Spartacus broke the paradigma many slaves were chained to, and proved that being free of roman law was possible. Spartacus´rebellion also decrease the ammount of slaves Rome had to about 100,000 less. This weakend Rome´s economy, and forced the Empire to take more precautions with the slaves. This made slavery much more expensive and selective, which gradually made the slave system inefficient and undesirable.