That’s not really the Marxist argument, the state doesn’t “crumble,” it withers by being superfluous. In Marxist analysis, the state is an instrument by which the ruling class of society oppresses the others, when production is fully collectivized globally there’s no more class to uphold or oppress, and so the tools like a repressive police force also become obsolete. There has never been a period where production has been globally collectivized, so no Marxist would say the conditions for the state withering have been met at any time.
That’s not really the Marxist argument, the state doesn’t “crumble,” it withers by being superfluous. In Marxist analysis, the state is an instrument by which the ruling class of society oppresses the others, when production is fully collectivized globally there’s no more class to uphold or oppress, and so the tools like a repressive police force also become obsolete. There has never been a period where production has been globally collectivized, so no Marxist would say the conditions for the state withering have been met at any time.