What does the suffix -ism mean in the word capitalism?

Private ownership and competition are the foundations of capitalism.

1. Possession
2. System
3. Science
4. Connection

Each of the "tales" in geoffrey chaucer's poem the canterbury tales are told by a different pilgrim on a journey to the city of canterbury. the poem has a large story (pilgrims going to canterbury) that encloses all the "little stories" or tales the pilgrims tell. which best describes the type of structure chaucer is using in his poem?