The main cause of the civil war and strife in Sri Lanka is their ethnic composition: Tamils in the north of the Island, who want independence and Sinhala in the South who want the country to remain united.
There is also a religious difference: the Tamils are predominantly Hindu and the Sinhalese are Buddhist.
There is an agreement of price and quantity in the market therefore all market forces stabilized and reached a price that consumers are willing to pay for goods and producers a price at which they are willing to produce in order to make a profit
The US and the Soviet Union