According to Osho, mass deaths don’t create a shortage for souls. Nothing dies; existence continually provides new wombs and new homes across a vast, renewing universe. If Earth cannot host further evolution, consciousness is received elsewhere—on planets ready for growth. Existence never destroys without preparing the next school; therefore, there is nothing to fear, only ongoing opportunity for higher evolution.
Souls don’t get stuck—if many people die, life finds other mothers or even other worlds so growth continues.