The concept that Adichie so beautifully and eloquently presents is that we as humans like to understand other humans by creating ‘single stories’ about them.
For example, when I was in primary school, my single story about Aboriginal and Torres Strait Islander peoples in Australia was that they were poor, not very smart and needed to be looked after. I had not had any real contact with Aboriginal and Torres Strait Islander peoples, did not learn much about their culture and believed what I was taught, which is that they are one homogeneous group that needs to be looked after.
We create so many single stories about people, places and culture. Sometimes people create these single stories without having direct experience of a place or culture.
Extending the concept further