Hamlet is comparing DEATH to LITTLE SLEEP.
Dr. López has probably found
"mirror neurons".
A mirror neuron is a neuron that flames both when a creature acts and when the creature watches a similar activity performed by another. Hence, the neuron "mirrors" the conduct of alternate, as if the onlooker were itself acting. Such neurons have been straight forwardly seen in primate species.
The correct answer to this open question is the following.
Although there are no options, we can say that the type of terrorist group that is responsible for the most lethal terrorist attacks (number of wounded and killed per attack), according to the dataset used by James Piazza is Islamist terrorism.
In the article "Is Islamist Terrorism More dangerous?" Piazza studies all of the elements that surround these dangerous terrorist cells such as their ideology, motives, cell structure, and goals. In his research, Piazza found to kinds of terrorist cells -both dangerous but with different motives. One is a type of a "strategic group," name deliberately chosen by Piazza; and "Abstract or Universal groups," more related to the type of al Qaeda terrorist cell. Piazza is a committed researcher that has analyzed more than 80,000 terrorist attacks from 1970 to 2016.
The reasons why President Lincoln believed that the U.S soldiers were fighting for during the American Civil War is that he had high hopes of preserving the union as well as helping the union survive. President Lincoln had only one goal in this Civil War and it was to restore the union. Hope this helps.