When is it appropriate for a nation to become an imperialist power?

Expansion

Imperialism is defined as: Imperialism is an action where a country (usually an empire or kingdom) extends its power by acquisition of territories. It may also include the exploitation of those territories which is similar to colonialism which is generally regarded as an expression of imperialism.

Imperialism, much like any other sort of autocracy, is rooted primarily in servility. Imagine it this way (if it were a feudal society), there are barons (lowest), counts (second lowest), dukes (middle tier), grand-dukes (middle-high tier), kings (high tier), and finally emperors (god tier). In order for a person to be formally considered as an "emperor", a king must have sworn fealty towards you, or essentially you must possess multiple kingdoms under your rule.

Remember that of course there are empires that are merely in name (like the Empire of Trebizond).

2 Examples (Antique, and Modern)

Archaic (pre-colonization): Let's give the example of the Kingdom of France, let's say (hypothetical), that the French annex the Kingdom of Spain. Since the French monarch controls 2 kingdoms, it would essentially equate to an Empire

Modern: This is now also applying the old concept (obviously without the "feudal" model, but now there are simply actions that are considered "imperialistic". For example, acquiring a colony would be considered of imperialist demeanor, for example, Belgian Congo. Imperialist actions were also shown in for example, the U.S.A., when they made the Philippines a protectorate, overthrew the queen of Hawaii, made Haiti a protectorate, (essentially the "Big Stick" diplomacy). In the modern era, one can be imperialistic without being considered an "empire", this is why we don't refer Belgium, the U.S.A., or the Netherlands (despite them owning all of Indonesia) as empires, even though in technicality, they are.

before there were tanks, machine guns, windmills, and solar panels, the first civilizations emerged that create the history of humanity which provided the larger context for western civilization. uses of weaponry and technology were used very differently in the ancient civilizations than they are today. relating back to the times of the ancient mesopotamian civilization, technology kept advancing throughout the ancient egyptian civilization into the ancient greek civilization, and then finally the ancient roman civilization. as techniques and strategies were past down from civilization to civilization, each shared its own similarities, as well as varied differences. one trait they had in common was to commit violence and economically overpower one another. technology has ultimately advanced due to the knowledge transferred from generation to generation. uses of sophisticated weaponry and devices have created more opportunity for warfare and improvement in the work place. ancient civilizations became more powerful due to the advancements of technology. technology did not only create the use of violence, but it also the economies grow and become stronger, because production of trading goods rose like never before. the rivers, such as the nile, tigris, and euphrates all flourished, as well as destructed civilizations. each civilization had different uses for these rivers, however, some benefited more than others. when analyzing ancient civilizations, there   are things you must understand

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