It would not, because Lamarckism is not correct (more precisely: Does not give accurate predictions to what will occur over time). This would be incredibly obvious with even a modicum of experimentation. More to the point, I'm pretty sure Lamarck's ideas were discredited before Darwin, and you can't forget Alfred Russel Wallace, who came up with natural selection completely independently and triggered Darwin's publication of Origin of Species. That indicates there's enough material out there for other people to come up with it if you just get rid of Darwin, or get rid of him and Wallace, or...you get the point. You'd end up having to kill most biologists on the planet to avoid natural selection being developed.