This is the 3135th most frequent Russian word.
культурой
The Russian word "культурой" is the instrumental case of "культура," meaning "culture" (used as "with/by culture").
In this sentence, "культурой" is a singular instrumental noun, referring to the subject of cultural aspects or traits.
Я интересуюсь культурой разных стран.
I am interested in the culture of different countries.
Here, "культурой" is used as a singular instrumental noun, referencing practiced respect and communication norms in society.
Мы должны учиться уважать друг друга, начиная с культурой общения.
We must learn to respect each other, starting with the culture of communication.
In this sentence, "культурой" as an instrumental noun connects culture with academic studies.