If you want one book on why equality is good for all try "The Spirit Level": the authors set up the equality trust which has loads of info available at www.equalitytrust.org.uk .Daniel Dorling writes on this sort of subject.
I found KickAssAngel's post interesting: "I think that somehow we forget just how much of a treadmill life has always been. Before industrialization the life expectancy of labourers was very low...Since industrialization life has got better"
Not quite. Read up on the early Victorian times, the early years of industrialisation were not an improvement for the vast majority of people. Remember all those kids shoved up chimneys and down the mines? Many people did indeed literally still put their backs into earning their living.
"It is only since WW2 that people have even thought that they could own a house, plan a lengthy retirement, have serious amounts of leisure time and the resources to have hobbies etc to any great extent."
And now those opportunities are regressing. Why? Technology is improving, but the improvements are not being used to make most people's lives easier. Productivity is much higher than it was in those times: GDP per capita is much higher. We could choose to use all those resources to continue to make people's lives easier. We could use it to reduce the working week for all for instance at the same wages. Instead we are allowing a smaller and smaller group of people to grab more and more of the wealth. I'm glad shove mentioned the death of the public sector as this is the key.
The Victorian age was a slow stumbling step away from the upheavals of early industrialization, towards creating a fairer state. It didn't just happen: it was a choice, a choice that the social upheavals of the wartime increased. We chose to create the public sector, the NHS, social housing, schools and education for all, libraries, access to law for all, and as you say everyone was better off for it. It was a compromise, a negotiation against the natural inequality-driven apocalypse that Marx foresaw capitalism causes. Withdraw it, and we regress.
Caring responsibilities call. Shame as this is a fascinating topic for me!