A good conclusion

the central claim and
key reasons that support the claim.

In conclusion, the central claim of this argument is (state the claim). Several key reasons have been presented to support this claim. First, (state the first reason along with its supporting evidence or explanation). Second, (state the second reason along with its supporting evidence or explanation). Lastly, (state the third reason along with its supporting evidence or explanation). These reasons provide a strong foundation for the central claim and collectively bolster its validity. Based on the evidence and reasoning presented, it can be concluded that (restate the central claim). Overall, this argument successfully establishes a compelling case for (restate the central claim) through its well-supported and persuasive reasons.