What's the idea behind masculinity?

"In the Igbo world, men are the dominant sex and they “rule” over their families, including their wives. Women are relegated to a more or less servile position, often living in fear of their husbands. Though Okonkwo’s quick temper with his family is never portrayed as admirable, he unquestionably has the right to be aggressive at home".

In this quotation taken from chapter two of Achebe's Things Fall Apart says that in the Igbo world, men are the dominant sex whereas women are below them. However it highlights that the protagonist's behaviour, Okonkwo, is not considered right and admirable. 

We all know from the story that what has shaped Okonkwo's behavior is his relationship with his father. His father was a lazy and coward man who was  unable to support his family, and also Okonkwo considered him very affeminate, which, from his point of view, gave his father a very weak image. However, as he does not want to become in someone like his father, he behaves in a very violent and abussive way and tries to be masculine in every single way. 

What caught my attention is the interpretation of being masculine, because is related with feeling anger. Okonkwo does not allow himself to feel anything, that is, to show affection for somebody, because if he does, he would seem weak, which is a feature of being feminine. However, in order to seem strong, he is agressive and anger is the only thing he can feel since he would provoke fear the people around him.

All in all,  in other stories we have been reading for this course, like A streetcar named Desire and Look back in anger, this masculine role in men has been present and even though their origin is different because of the different contexts they are setting up, they have something in common: they see women as an object, as something weak and inferior, and how agressive and violent they are towards them.