1. inclusive of all people regardless of education, background or social standing.
People from all walks of life attend the festival each year
When you talk about people from 'all walks of life', you mean a diverse group of people, spanning different ages, with different social standings, beliefs and backgrounds. This phrase is used to emphasize the diversity and variety of people. It is similar to the expression 'people of all shapes and sizes'. It can be used in a number of contexts including social and professional ones. You will often hear it used to describe audiences or attendees at events or those towards whom products are marketed.