The reason for prgress in Kerala was CPR (CP Ramaswamy Iyer) not communists. The Thiruvangur Samasthanam budgeted 15% of its revenue on education something that a socialist India or communists never can even dream of.
CPR's actions resulted in superior literacy rates in Kerala, new skills and also inculcated interest in fine arts.
It is a pity that CPR like most heros in India has not not the recognition that he deserves and charlatan communists and evangelical christians are walking away with credit for Kerala's social indices without any meaningful contribution from them.