Admitting it can wain admits the concepts of waxing and waining, which admits the concept of waxing. It could rise again. it depends how bad the other choices become exploiting their new found international reputation.

Also, it was built on useful largesse. I think the beginning of the end to me (I am sure it predates this, but this is when I became more conscious of it) was when the funding of the UN dried up because militant american christianity hates women's reproductive rights. That was a massive flip in posture towards a rational approach to improved health in Africa and for what? For a short term domestic agenda. The UN systematic corruption and money laundering was a huge issue but what motivated the change wasn't "cleaning up the UN" it was putting contraception back in the box.

[edit: "this century" meaning "in the last 25 years" because during the Vietnam era, American reputation was pretty low worldwide. I keep forgetting we're in a new century. The war on sex was President-pro-tem Nancy Reagan era stuff.]