The Renaissance writer and diplomat Niccolo Machiavelli wrote that the “the end justifies the means.” What did he mean by this statement?

In Wilson's 14 points, The points he propsed to eliminate war are the followings:

-No secret diplomacy (point number 1)
-Reduction of armaments (point number 4)

The reason why these could potentially eliminate war:

Secret diplomacy lead to the formation of alliance system, which would drag the other countires into war and expand the war scale. once a war broke out. For example in World War One, there was Triple Alliance and Triple Entente.
Secret Diplomancy is also the lead to mistrust between countries, and it could intensify the hostility between them,causing war more likely to happen. This is why “No secret diplomacy” is proposed.

This is however,unfeasible as there is no momitoring system between countires.

The reduction of armament is to prevent war for obvious reason that when there are less wepon war is more unlikely to happen.

Armament race had proved to be a cause kd the war as it would cause suspicion between nations as well as hostility, which could finally pave way to war.

On the other hand, this is not feasible as well, as nations wanted to defend themselves and had nation supremacy through having stronger weapons.

Hope it helps!