I don't think the Irish Famine is a good example here at all. There was easily enough food for everybody in the British Isles, and certainly in the British Empire as a whole. But Victorian-era capitalism decreed that these people deserved to be left to starve to death.

Pure capitalism and pure socialism are both destructive ideologies that inevitably lead to cruelty. Hasn't humanity moved on from this false dichotomy yet? Successful societies manage the balance between the two.