The Chicken or the Egg?

Questions of what came first are sometimes of no importance, like the chicken or the egg, but sometimes can be of large importance. Do you know what comes first in the New Testament?

Which books were written in what order? Would it change your opinion to know what was written first?

Here is my best understanding.

Actual history took place first (obviously). Chirst life ended somewhere around 30 A.D.

Of the New Testament books, the Gospels were not the first books written, in fact, they would have been written much more near the end of the New Testament books written.

The order might look something like this....
Thessalonians (both of them), Galatians, Both Corinthian letters, Romans, Ephesians, Colossians, Philippians, Timothy, and then Mark.

Mark is likely the first Gospel written (even though Matthew comes first in most Bibles). It was written sometime between 65-70 A.D. and may not even have been written until after Paul had died.

Most of the letters of the New Testament were written well before any official Gospel document was written. These epistles confronted false teachings and re-enforced truth confrontationally with those who were being persuaded into believing other things. Around 65 or so, Mark decided that maybe a biographical (not like a modern biography though, like an ancient one) would help show (in a different way than the epistles) what we should believe. Their intent is not first to be historical (though they are), but to be Christological (to show Christ's actions, teachings and significance).

There are some unique understandings to these documents, and their place in history when you understand the order they were written in. I can explain more if asked, but don't know where to jump off from now. Feel free to fire away.