What are some archaic practices/beliefs still used in modern society?

For my English class we’re doing a project on archaic practices/beliefs in the modern world and why they still exist. It’s based off a book we just read called “The Kite Runner” by Khaled Hosseini. In it some practices like

-Stoning of women
-Forced dress code
-Combination of Church and State
-Forced Religion

are seen in the book. My teacher wants us to pick 3 other practices that are still used today. They can’t be too broad or too narrow, enough to write a nice research paper on as well as make a Power Point on.

I’ve thought up of one so far; Sacrificing animals (In Islam, Hinduism, native traditions etc)

Can you guys please help me think up of a few more?

I’m accepting any answers since all I need is a list of practices which I will then narrow down to one by next week.