<span><span>Because
they activate "</span>
the nucleus accumbens and the
ventral tegmental area".</span>
Ventral tegmental region (VTA) includes cell collections of
dopaminergic neurons anticipating to the core accumbens, amygdala, hippocampus,
and prefrontal cortex. These neurons are fundamentally involved in cerebrum
components of reward, support, and passionate excitement. Their action has been
firmly corresponded to the accessibility of essential rewards, for example, nourishment,
water, and sexual conduct.
When balance of power exist between two nations, all the countries that are involved in a conflict would be fully aware that each of them had the capability to create massive destruction toward one another.
Because of this awareness, both parties would become hesitant in making initiation to start a war and might choose diplomatic method to solve their difference.
1-the introduction of New World crops
2-the new ideas
3-less Europeans died after the exchange