Because such form of art fit as the mirror of the society they live in.
Comedies.
If we divide Shakespeare's plays into comedies, histories and tragedies, the comedies outnumber the others almost two to one. There are ten histories and ten tragedies and eighteen comedies.
They were the first people to write the alphabet. The Ancient Greek's
no
yes
Drama as we know it today.
No
Comedies and tragedies. Comedies and tragedies.
No.
The plays Shakespeare wrote with are traditionally divided into Histories, Comedies and Tragedies. His favourite genre of poetry was the sonnet.
they had most of the similar topics like the ones we have today
William Shakespeare wrote 38 plays. They are divided into comedies, histories and tragedies. See the related question for a full list of his plays.