Honest answer. It didn't directly answer the question since it was a hypothetical and still a question, but...
You are speaking hypothetically but in reality no one has yet established peace so someone has to try something new. As you know, the world's religions have all been around for thousands of years and yet world peace has eluded them all.
Not some
one needs to try someone new. WE need to try something new. Our religions bring diversity but working together, there is no central foundation such as Bahaullah or Christ (and so forth).
The reason religions like yours and others haven't got to world peace is because there is a you vs. them mentality. It's a (and the example is below) unless you follow this prophet, world peace, salvation, so have you will not happen. If you stay in that mindset, of course greater peace will not come.
Their purpose was not to establish peace which is why you won't find even one verse in the entire Bible or Quran mentioning it.
I don't know about the Quran. The Bible (in christian eyes) teaches god wants
everyone to be saved. That's their definition of world peace. Everyone saved in christ. That' heavily in the gospels, Romans, Hebrew, Acts, and Galations.
But in God's latest Revelation world peace is mentioned thousands of times with instructions on how to establish and maintain it.
No. Each person's world peace contradict each other. Bahai included. It's all convoluted in one big mixing bowl and no one sees it but us non-universalist and non-hiarchist who see religions on an equal level without needing to bring one into another to achieve their
own goal.
So when all else has failed why shouldn't we turn to Baha'u'llah?
This above is my central point throughout the whole entire thread.
Religion is individual or community depending on the culture and country where one is from. The worldviews clash in some cases. Bahaullah cannot fix this because that would be taking down diversity to mold other religions into his view of peace.
Now, it's alright that you believe in his one foundation. That's your right. It is just like other religions just Bahai aren't aggressive about it. But not seeing it is very bothersome especially when it involves, once again, cultural appropriation.
Bahaullah does not have the answer. We find the answer. Not one person. It's a joint effort. Not a prophet effort.