For some closure for the events that happened in New Zealand I just want to share this speech by Bertrand Russell that he delivered winning the Nobel Prize for Literature.
The title means love for excitement is the subject that Bertrand Russell points in the speech that follows. If human would get along this love for excitement that creates war should be solved.
[...] come now to other motives which, though in a sense less fundamental than those we have been considering, are still of considerable importance. The first of these is love of excitement. Human beings show their superiority to the brutes by their capacity for boredom, though I have sometimes thought, in examining the apes at the zoo, that they, perhaps, have the rudiments of this tiresome emotion. However that may be, experience shows that escape from boredom is one of the really powerful desires of almost all human beings. When white men first effect contact with some unspoilt race of savages, they offer them all kinds of benefits, from the light of the gospel to pumpkin pie. These, however, much as we may regret it, most savages receive with indifference. What they really value among the gifts that we bring to them is intoxicating liquor which enables them, for the first time in their lives, to have the illusion for a few brief moments that it is better to be alive than dead. Red Indians, while they were still unaffected by white men, would smoke their pipes, not calmly as we do, but orgiastically, inhaling so deeply that they sank into a faint. And when excitement by means of nicotine failed, a patriotic orator would stir them up to attack a neighbouring tribe, which would give them all the enjoyment that we (according to our temperament) derive from a horse race or a General Election. The pleasure of gambling consists almost entirely in excitement. Monsieur Huc describes Chinese traders at the Great Wall in winter, gambling until they have lost all their cash, then proceeding to lose all their merchandise, and at last gambling away their clothes and going out naked to die of cold. With civilized men, as with primitive Red Indian tribes, it is, I think, chiefly love of excitement which makes the populace applaud when war breaks out; the emotion is exactly the same as at a football match, although the results are sometimes somewhat more serious.
To read it full on: https://www.nobelprize.org/prizes/literature/1950/russell/lecture/