Conversation so far:
What legacy did J.R.
have?
On the economic front, Jayewardene's legacy was decisive.
How was it decisive?
Since Jayewardene's reforms, the island has maintained healthy growth despite the civil war.
What reforms?
CANNOTANSWER.

Question: What else did he leave behind?
Self-contained rewrite: What else did Jayewardene leave behind besides a legacy?