It's easier and better now to indulge in diplomatic soft-power over the colonialistic power grabs. Colonialism's legacy is alive and well certainly but truly attempting to hold onto countries died with the Vietnam war. I'm sure it'll come back into fashion but for now it's better for larger/richer countries to engage in a proxy war and sit around wringing their hands over all the atrocities being committed by those you're financing.
Anyway, it's because of the legacy of colonialism and the rise of Chinese soft-power (they send vast numbers of engineers to less developed countries including most of Africa both sahara and sub saharan regions) that you're better off learning french or Portuguese or spanish in school rather than chinese. Your kids will be actively competing for business with these former colonial regions against the Chinese.
The west and America in specific have a strong legacy of soft-power but much of that has been through social programs and missionary work rather than offering wholesale development and infrastructure. The peace corps and AIDS money can only do so much, but sadly the US is "America First" now so that means we are going to lose big time over the next 3 to 7 years as our diplomatic corps shrinks and we drop global obligations.
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You don't understand how weapons work.
Which is fine, but weapons have a psychological purpose as well as their physical properties.
If you don't want someone messing with you you show them that you aren't someone to mess with. Why do you think Russia and China would put on huge military parades? It intimidates their own populace, builds pride and shows the rest of the world their military might.
Same thing with Teddy Roosevelt and his "big stick" politics where we sent warships all over the world to show that we could hold onto, defend or even put down rebellion in any of the American colonial conquests.