A quote from Ben Goldacre..
I think you'll find it's not quite as simple as that !
BEWARE SIMPLE EXPLANATIONS ... he was getting annoyed by poor thinkers arguments who had a oversimplistic view of the world
see SKEPDIC.COM

- My thoughts : Before we travel we live in a Black and White world : "We say things like "American are rich", "Indians are poor", "Women are good at multitasking",

but after I travelled I realised that the world is the full colour of the rainbow

.. We can't say "Italians are ..." cos that is denying the huge rainbow range of Italians, there is not one Italian way of thinking

.. we have to qualify our generalisations
e.g. Don't say "British people are punctual", " More British people are punctual than is common in most countires", (cos some British people are always late etc)
..accepting these generalisations leads us to have a false picture of the world "British people like watching football and drinking beer".. well actually on a Saturday even though 20% of people might be watching football and drinking beer 80% aren't ..

We have a particular problem in assuming a whole population do something when in fact its a noticeable minority. e.g. most Americans are not grossly overwaeight even though a large group are

..but how we love our simple explanations

- When it comes to jobs and sexism etc. it's important that people are recognised to be individuals not labelled with a group tag

There is more on this 406 Planet Nonsense is where I live

- Be particulary careful about applying black and white thinking to politics ..usually things are not what they first seem.. just when you think you undersatnd it new revealations appear
Politics is like a Russian doll within another Russian doll ... there are common things like getting the left and Greens pre-occuppied with nuclear power, or war ..while you slip other things past them .. and people pretending to be green turn out to be the least green in practice