Varnas are based on the work and purposes being served by every person. NOT on Birth as is wrongly believed.
1. Brahmins: The Teachers
2. Kshatriyas: The Protectors - Warriors
3. Vaishyas : The Traders - Businessmen
4 Shudras : Menial workers or Labourers
There have been many cses throughout History of change of Varna based on the work and deeds, e.g. Vishvamitra born of a Kshatriya, became a renowned Sage - a Brahmin
"what is bad about the varna system" is not the same question as "what is varna" varna is Hindu religious-social group known as a "caste"
Varna's population is 334,870.
Mahavira's varna was Kshatriya, or warrior.
The area of Varna is 238 square kilometers.
The Hills of Varna was created in 1948.
The population of Varna Province is 468,238.
Crusade of Varna happened in 1444.
Varna Aquarium was created in 1932.
Siege of Varna happened in 1828.
The population of Varna Municipality is 343,704.
The population of Varna is 349,000 (according to Wikipedia).
Varna is on the coast of the Black Sea.