Earlier quoted context omitted.
If buying and selling things internationally makes a country capitalist, then Soviet Russia was capitalist. Pre-Soviet Russia was mercantilist, which can be somewhat handwavyly described as capitalism-unless-I-can-kill-you, both between people within a nation and between nations themselves and is still not entirely dead.
Buying and selling things internationally does not make a country capitalist.
Capitalism is circumlocutions of long dead people who provided little to society but the sound of their voice, vacuous writings.
So kind of the educated labor exploiters of the past to explain how the world must work. Very TINA of them.
Capitalism is people socially convincing each other there's a communal upside to capitalism. Sounds almost like socialist communist nonsense, this capitalism.
Strip away endless obfuscation the real economy is anything but physical statistics, it becomes clear capitalism is just empty rhetoric.