What if "Black July", Sri Lankan war was averted?

The massacre on thousands of Tamil citizens after a government attack in 1983 is generally seen as the starting point of the civil war on the island, escalating from early decades of hostility. Could this, and the subsequent rise of civil war be averted? If peace or a compromise could have been brokered, could Sri Lanka be successful in (if not stopping) minimizing the ethnic conflict to at least a safe level? How would the island look today?
 
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