From what I was reading, some studies did find it, but these studies used massive amounts of soy not likely to be encountered in every day diet. And also there's this: http://www.sciencedirect.com/science/article/pii/S0015028209...
Clinical studies show no effects of soy protein or isoflavones on reproductive hormones in men: results of a meta-analysis
So I would say talking about epidemic is premature.
From what I was reading, some studies did find it, but these studies used massive amounts of soy not likely to be encountered in every day diet. And also there's this: http://www.sciencedirect.com/science/article/pii/S0015028209...
Clinical studies show no effects of soy protein or isoflavones on reproductive hormones in men: results of a meta-analysis
So I would say talking about epidemic is premature.