socialism is essentially a way of distributing the wealth of a country, or of the world, equally, so everyone gets the same size slice of the pie.
whereas capitalism is a system whereby the wealth of a country, or of the world, is distributed according to how you earn it, by buying and selling goods, so in theory how large a slice of pie you get, is down to how hard you work....unfortunately reality isnt as simple as that though!
(and the pie is money or materials goods btw)
in my eyes socialism is the ideal way of doing it, but it will never work, its a lost idea, but on the other hand capitalism is deeply flawed in its current iteration and gives rise to large gaps in economic and material wealth, irregardless of how hard you work
thats probably not the best explanation though
and that may be wrong, but its how i understand it