Why did he choose the medium of a play to convey his message?

A play has an emphasis of performance, comparing to other mediums, like novel, music, etc. Characters are portrayed using gesture languages and tone of actors. This trait helps audience to better understand the message.

shorter than novels + oral -> suitable for wide public with varying levels of culture.

The story was in real time, which easily immerse audience.

What is the function of stage direction?

• influence the setup of ==mise-en-scene==, give instruction on behaviors/distance/speed/etc. of characters
• set the atmosphere