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Two questions about Raavana
First, how is Raavana a Rakshasa and a Brahmin at the same time? Second, if Raavana is Brahmin, how is he the king of Lanka? Since one's caste was determined based on one's karma, I would think Raavana to be a kshatriya by that logic.
This explains it in detail:
https://www.quora.com/IsthereanydifferencebetweenAsurasandRakshasasperHindumythologyWasRavanaanAsuraoraRakshasa
Basically, the 4 varnas (Brahmana, Kshatriya, Vaishya, Shudra) exist in every jati (deva, manushya, gandharva, rakshasa, pishacha)
So, we can have Deva Vaishya, manushya Kshatirya, Rakshasa Brahmana etc.
e.g. Ravana was Rakshasa jati & Brahmana varna. Shukracharya is Deva Brahmana. Chitrangadha is Gandharva Kshatriya.
Next, both birth & character determine one's varna. Normally, either one alone is not sufficient.
e.g. Drona was brahmana but fought in Mahabharata, Koushika was kshatriya but did severe penance for thousands of years and converted into brahmana (Vishvamitra).

This explains it in detail:
https://www.quora.com/IsthereanydifferencebetweenAsurasandRakshasasperHindumythologyWasRavanaanAsuraoraRakshasa
Basically, the 4 varnas (Brahmana, Kshatriya, Vaishya, Shudra) exist in every jati (deva, manushya, gandharva, rakshasa, pishacha)
So, we can have Deva Vaishya, manushya Kshatirya, Rakshasa Brahmana etc.
e.g. Ravana was Rakshasa jati & Brahmana varna. Shukracharya is Deva Brahmana. Chitrangadha is Gandharva Kshatriya.
Next, both birth & character determine one's varna. Normally, either one alone is not sufficient.
e.g. Drona was brahmana but fought in Mahabharata, Koushika was kshatriya but did severe penance for thousands of years and converted into brahmana (Vishvamitra).
20170519 17:07:08