Holodomor was the result of several unfortunate events including the Ukranian kulaks burning their produce to protest collectivisation, a natural famine and misjudgement of the State.

If the responsibility of Holodomor lies solely with the USSR, the nexus between the NATO and occupied Palestine are responsible for at least a billion deaths, going by your intellectual honesty standards. I have factored in death due to military interventionism, gun laws, and capitalism related deaths (death from being uninsured, hunger, poverty).