Stress..leads to be more aggressive...
"Under stress, vulnerable mice increase the frequency of nerve activity using the neurotransmitter dopamine," "That subsequently causes release of a nerve growth factor called brain-derived neurotrophic factor [BDNF]. Resilient mice overcome these changes by increasing the expression of molecules that prevent the release of dopamine." A neurotransmitter is a molecule that sends signals from one nerve cell to another. Mice in the experiments were so inbred that they were genetically identical. Then they were put under stress by being placed in the territory of larger, more aggressive mice. Some of the test mice adjusted well to the stress of the situation, while others avoided contact and showed submissive behavior. Stress makes us more aggressive... So, Try to overcome it....