What are the reasons for going to war?

war
Again and again war
War means
Armed conflict between nations or states.
Armed conflict within a state.
Armed conflict between citizens.
Status of hostility or conflict.
Participate in military activity.
New forms of war
Important: Traditionally, war has to do with the relationship between states
Today war can also be the armed struggle between civilians
In the traditional sense, war is the continuation of foreign policy.
In the newer sense, war is also a breakdown of all legality.
And even more
Every generation is at war.
Mostly it meant war between nations, but now we also know another war
War often follows an intense period in a nation / ethnic group.
War is not just human behavior: ants recognize their enemies and their cities war for days
Why then war
Prestige, power, ambition, vengeance, religion
Defense of the supposed interests of the state
Land, (power, money and natural resources)
Economic reasons (war brings jobs, even if it destroys)
Solving political problems
Solving internal problems (it can distract people's attention)
Consequences
Loss of Generations (Russia and Germany in World War II)
Loss of leaders (government changes)
Destruction of land and treasures (this can of course be taken into account by both sides)
Further consequences
Trauma (some people get totally lost)
Changes in the structure of society (loss of the main working group and switching to other groups, men to women)

Pre-historical phase (up to 6000 B.C.)
- local war
- Individual fight
- Short stint - Lots of fights between Noden and townspeople
- At the end of the period, the invention of firearms that could be thrown or adjusted more and more precisely.
 

Historical phase (6000 BC - 1500 AD)
- Individual fight
- Tied to time
--Days
- mostly on land
--Stones, branches, axes, bows and arrows,
Lances, chariots
Modern War (1500-1945
- greater population density
- the fights stretch
- Improvements to weapons (easier to use, farther reaching, less personal)
- Pistols, rifles, cannons, tanks, planes, bombs, submarines, rockets, gas
,
Still modern
- less human strength, therefore longer wars
- greater mobility (therefore more losses)
- In the 17th century wars were so terrible that certain limits were set.

More war
--- Maneuvers (to impress the enemy.)
--- the magazine system (maybe also to spare civilians from war)
--War became more and more a war of extermination,
--or the war of wait and see without destroying the enemy.

Nuclear war
- Was used to have specific goals.
--There used to be stages people went through
before war broke out (e.g., diplomats talked and
if that did not work, was broke out).
More nuclear stuff
--Then the diplomats came back after the war
and once more patched things up.
--With nuclear war the traditional purpose of war,
that is, to conquer land has been undone;

More nuclear war
--now peace and war go on at the same time (e.g.,
Iran-Iraq War, one day they talked,
the next day they fought).
- To date, only two nuclear devices have been used
Nuclear war
in war (WWII), and supposedly we have a "nuclear shield"
over all traditional wars that are being fought (that is, there is always the threat of nuclear war).
--The U.S. and the U.S.S.R. had many safety devices to prevent accidental war, but
 

The end of the nuclear war
- the real danger comes from terrorists, and other unstable
groups, including some Third World nations
which may use devices to pressure other nations.
--Recently nuclear weapons have become very precise and
- this has brought about rapid rethinking of such weapons.
 
Still no end
If nuclear devices have become so precise that we can hit
a truck almost any place in the world, do we have to blow
up a whole city when we just want to hit one truck?
Conventional weapons, i.e., are becoming more appealing again.