EIU/Mercer reveals the list of the top 50 places in the world to live in 2015, with Melbourne ranking the most liveable city on Earth. Index factors include liveability, cost of living and safety.

The "best cities to live" are those that offer the best quality of life.

Defining the term "quality of life" is not an easy task. In fact, what constitutes a good quality of life has occupied philosophers since Plato and Aristotle, and countless definitions have been proposed.

Nevertheless, it seems possible to find some elements on which most scholars agree. First of all, as "quality of life" is used to evaluate the overall well being of individuals and societies, it should not be with The Happiest Countries In The World. Although most studies on the quality of life indeed do take into account indicators of economic success such as income per capita, wealth and employment, they also go beyond those measures to include the environment, physical and mental health, education, leisure time, infrastructure and safety. Also often included are concepts such as freedom, human rights, human flourishing, social belonging and happiness.

The Economist Intelligence Unit’s (EIU) Global Liveability Ranking and Report, August 2014 is a data driven ranking based on 30 qualitative and quantitative factors spread across five areas: stability, infrastructure, education, healthcare and environment.

TOP 10 BEST CITIES TO LIVE IN 2015

1- Melbourne, Australia
2 Vienna, Austria
3- Vancouver, Canada
4 Toronto, Canada
5 Adelaide, Australia
6 Calgary, Canada
7 Sydney, Australia
8 Helsinki, Finland
9 Perth, Australia
10 Auckland New Zealand

11 Zurich Switzerland

12 Geneva Switzerland

13 Osaka Japan

14 Hamburg Germany

15 Stockholm Sweden

16 Montreal Canada

17 Paris France

18 Frankfurt Germany

19 Tokyo Japan

20 Brisbane Australia

21 Berlin Germany

22 Copenhangen Denmark

23 Wellington New Zealand

24 Oslo Norway

25 Luxembourg Luxembourg

26 Amsterdam Netherlands

27 Honolulu United States

28 Brussels Belgium

29 Munich Germany

30 Pittsburgh United States

31 Hong Kong Hong Kong

32 Dusseldorf Germany

33 Lyon France

34 Barcelona Spain

35 Washington DC United States

36 Atlanta United States

37 Chicago United States

38 Miami United States

39 Detroit United States

40 Boston United States

41 Seatle United States

42 Los Angeles United States

43 Minneapolis United States

44 Madrid Spain

45 Cleveland United States

46 Dublin Ireland

47 Houston United States

48 Milan Italy

49 Rome Italy

50 Budapest Hungary