1.   Britain had a very rigid class structure.

2.   The rigid class distinctions which characterised British society are beginning to break down.

3.   He moved to industrialize Bulgaria, educate its population and break down rigid class barriers.

4.   It had been customary over generations for royalty to mix with commoners, even in the rigid class system that existed years ago, he explained.

5.   It was a place infused with a Dutch entrepreneurial, middle-class spirit, devoid of the rigid class barriers found in neighboring colonies.

6.   Plato is too often portrayed as an ideologue, censoring poetry and music in his perfect state, creating rigid classes and philosopher kings.

7.   The Hutu majority were farmers, a downtrodden underclass within a rigid class system.

8.   Where rigid class lines divide the haves from have-nots, death is the ultimate level playing field.

9.   They are considered so low in status that they are not included in the rigid class structure.