Answer:
Wilson might think it is necessary because it could deepen hostilities, create resentments and infuriates others who are not part of.
Step-by-step explanation:
To begin with, it's important to state a clear understanding of what secret agreement is. Secret agreements are a specific type of agreements whereby the stakeholders involved resolve to conceal and/or keep under the carpet, the substance of the agreements beyond the reach of other states. The hiding of such is where the connotation 'secret' come to be.
Wars are triggered by a number of factors. At the international scene, an individual state trust and believe absolutely in itself alone. Why? She is not 100% what a neighbouring state or suppose ally could do that could threaten its existence, in a bid to regional dominance.
Dominating has been one of the intrinsic qualities in humans. This was why an otherwise friendly nations could point guns at the other in the face of strife.
Hence, for Wilson, prohibiting secret agreements is basically hinged on boosting the transparency and dependability among nations. Suspicion, resentment and built up state issues are naturally settled if there is a clear communication of feelings among nations.
This is basically the idea behind Wilson stance on Secret agreements and/or treaty.