Church's Birth Rates Are Imploding - Liberal and Conservative Presbyterians

Only 2% of millennial parents hold to a Biblical worldview, while 67% still claim to be Christians—latest Barna results. We take a look at the PCUSA's, EPC's, and PCA's birth rates—and find that the PCUSA's and EPC's birth rates are about half the national average. They have an aging church population, and they're just not having kids. The PCA's is about the same as the national average—still low. But what are the real worldview issues underlying all of this? What makes for a healthy, reforming, biblical church? While birth rates aren't the number-one issue, what are the worldview issues that really matter?