does this need a comma:

Over six billion souls in the world and they all have something in common.

Thanks for ur help.

No, but it needs a verb in the first half of the compound sentence.

Yes, after "world", but it's not really grammatically correct even then. There is an implied but missing "There are.." at the beginning of the sentence. As another option, you could omit the words "and they all" and not have to use a comma.

Yes, a comma is needed in the given sentence.

To determine whether a comma is necessary in this context, you can consider the rules for using commas in a sentence:

1. Use a comma to separate two independent clauses joined by a coordinating conjunction (e.g., and, but, or).
- In this case, the sentence has two independent clauses: "Over six billion souls in the world" and "they all have something in common." The coordinating conjunction "and" is used to join these two independent clauses, so a comma should be placed before "and."

Therefore, the correct sentence should be:

"Over six billion souls in the world, and they all have something in common."

Remember, using correct punctuation is essential for conveying your message accurately and ensuring clarity in your writing.