Of the top twenty most developed countries in the world (ranked by HDI), over half (13) have some form of proportional representation. They aren't all Scandinavian countries, though predictably many are. Which of them would you not consider a stable government?
Y Norway
Y Australia
Y Switzerland
Y Netherlands
United States
Y Germany
Y New Zealand
Canada
Singapore
Y Denmark
Y Ireland
Y Sweden
Y Iceland
United Kingdom
Y Hong Kong
South Korea
Japan
Y Liechtenstein
Y Israel
France