Answer:
First of all, based on Biblical principles, Marx and Engels' plan for closing the economic gap and putting the production under the control of the workers is not the best plan. This is because, in Romans 13:1-7, it says that the authorities that exist already were put there by God: " The authorities that exist have been established by God" (Romans 13:1). Also, it says that whoever rebels against the authorities will bring judgment upon themselves: "Consequently, whoever rebels against the authority is rebelling against what God has instituted, and those who do so will bring judgment on themselves" (Romans 13:2). Marx and Engel wanted to overthrow the government and the authorities. This is against the Bible, which says to not do that. They wanted to replace the government that existed with another government. But God knows what's best for people, and he wouldn't want people to change his plans, because all people would do is just ruin everything for themselves.
Secondly, the following statement is not realistic at all: "People would voluntarily work for the common good, and as more nations saw the 'perfect society,' they would all convert to communism. Eventually, all national governments would be eliminated and wars would cease." The reason I say that this statement is not realistic is because, in Romans 5:11-13, it says, "Therefore, just as sin entered the world through one man, and death through sin, and in this way death came to all people, because all sinned—To be sure, sin was in the world before the law was given, but sin is not charged against anyone’s account where there is no law." This means that no matter how people try to make a perfect society, they will not be able to do it because sin entered man, and in this way "death came to all people, because all sinned", even though it would be wonderful if that could happen! Also, this passage from the Bible supports the statement that people are sinful: "They have become filled with every kind of wickedness, evil, greed and depravity. They are full of envy, murder, strife, deceit and malice. They are gossips, slanderers, God-haters, insolent, arrogant and boastful; they invent ways of doing evil; they disobey their parents; they have no understanding, no fidelity, no love, no mercy" (Romans 1:29-31). Ecclesiastes 3:8 says," a time to love and a time to hate, a time for war and a time for peace. " This shows that wars would never cease on this sinful earth, and there will always be people hating other people.
<em>Hope this helps! :)</em>