I was a very early anti-fragilist!
In April 2003 this is what I argued in a formal written statement delivered as an Executive Director of the World Bank:
"A mixture of thousand solutions, many of them inadequate, may lead to a flexible world that can bend with the storms. A world obsessed with Best Practices may calcify its structure and break with any small wind. Who could really defend the value of diversity, if not The World Bank?"