It will endure.
In poorer more backward countries it will persist, for a while. Here in the US it is in a much steeper decline than other religions. The attrition rate of white Catholics is staggering. It can't survive if parents fear letting their kids in the same room as priests. Older Catholics will stay, and then die. Younger ones won't take their place. Why would they want to? In 30 years Catholicism will be a tiny fraction of what it is now in North America and most of the practitioners will be Hispanic.
Did he believe in evolution too?