While there are some scholarly debates regarding authorship, the overwhelming consensus within the Christian tradition is that Paul wrote both 1 Thessalonians and 2 Thessalonians. This is based on the following points:
* Internal evidence: The letters themselves refer to Paul as the author, and they align with Paul's known style and theology.
* External evidence: Early Christian writings and church leaders consistently attributed the letters to Paul.
* Linguistic analysis: The language and structure of the letters are consistent with Paul's other known writings.
While some scholars suggest the possibility of a later author using Paul's name, this view is not widely accepted. The strongest evidence points to Paul as the author of the Book of Thessalonians.