@Maverickess - thank goodness for people like you 
I am astounded having RTFT that there has been so little mention of the importance and luck of being physically and mentally healthy.
Judging by this thread, and by successive governments and political parties pre election campaigns, those of us who are unable to work, however hard we would like to, really are totally worthless in a capitalist society. And don't we know it.
A few posters have mentioned about people with disabilities or chronic illness and how they have achieved great things. That is genuinely fantastic and they will have probably worked even harder to get where they have. However many of us with poor health will have tried to "work our arses off" but unfortunately our bodies have other ideas.
Just as well some of us value people for more than their economic value. And before everyone piles on, I am well aware that a healthy economy is required in order to provide for those of us at the bottom of the heap.
However it is rather disingenuous for those who are able to work hard not to acknowledge that health is the greatest gift you have been given. So many people seem to take it for granted.
Many things in life can be determined by things within your control eg willingness to work to the best of your abilities, pride in your work and a healthy work ethic.
However, as the OP has mentioned, there are also a number of factors which are outside your control.
I fully admit that I have been lucky in being born into a stable family, in a western society that provided me with educational opportunities. I am lucky that because of my ethnicity background, I have not been subject to racism. I am lucky that I was born with a level of intelligence that enabled me to learn and develop my intellectual skills.
I can recognise all of these things as being lucky. Just as I can recognise my bad luck in having had a lifetime of a disabling and chronic illness which means I am unlikely to be able to carry out any paid employment, however "hard" I work (although I have done in the past).
It seems to me that if MN is reflective of society at large, it is quite a depressing picture.