That is a sort of philosophical question, as for me. For people also define culture a lot. Still, that is true, the culture you were born in defines your personality, as it forms your character and manners a lot.
The writer W. Somerset Maugham said about culture building a person:
“It is very difficult to know people. For men and women are not only themselves, they are also the region in which they are born, the city apartment or the form in which they learned to walk, the games they played as children, the old wives’ tales they overheard, the food they ate, the schools they attended, the sports they followed, the poets they read, the God they believed in. You can know them only if you are them.”
That is so indeed. The environment we live in, nationality we hold, our race, religion, and beliefs - all of this influences what kind of people we are, how we behave.
We can clearly see the difference between people from Europe, America and Japan, once we see them in one place. Practically everything they do is defined by their culture.
I would never agree to the previous comment. Nowadays we do not have such a thing like ‘pure culture.’ Take a close look at America and Europe and the rest of the world. Constant mixing of nations and cultures is happening every day! Emigration processes are so high that we can never know who is standing in front of us, and loads of factors can define their behavior model. People with Japanese appearance are actually American and have never been to Japan. And at the same time, individuals who have European appearance are fluent in the Japanese language for they do live there their whole life. And what about the amount of traveling modern youth does? They do absorb everything from each environment. So how can you say they are defined by their original culture they had in the homeland?
The answer would depend on what you consider under the term ‘national culture.’ Yeah, the modern world has mixed a lot. Still, loads of cultures remain ‘untouched’ so to say. Those are mostly the countries of a so-called ‘third world,' but if you look for more, you’ll definitely find them. So, in your essay, put a definition first, and then proceed on with writing, That’s the best advice I can offer.