1 Peter 4:6 For this reason the gospel was preached also to those who are dead, that they might be judged according to men in the flesh, but live according to God in the spirit.
This does not mean we have to go stand in graveyards and preach to the graves! This means we have to preach to the people who do not yet know Christ.
Christ will judge every person when the time comes, but unless they have had some Gospel message told them, they may find excuse not to be guilty.
Some criminals get found ‘not guilty’ because they find excuse by one way or another to not be charged; but this will not happen with Christ.
He will ensure every person gets to hear about God, Christ and the Holy Spirit before it is too late!