A just-published study in The Lancet involving, among others, researchers at King’s College London, compared 900 people who had been treated for psychosis with 1,200 people who had not. Sample participants were drawn from across Europe and Brazil.

Both groups were surveyed on a host of factors, including their use of marijuana and other drugs. The study’s authors concluded that “people who smoked marijuana on a daily basis were three times more likely to be diagnosed with psychosis compared with people who never used the drug. For those who used high-potency marijuana daily, the risk jumped to nearly five times.”

By “high-potency” the researchers meant marijuana with a THC content of more than ten percent. To put that figure in context, a study of the weed seized by the DEA between 1995 and 2014 found the THC content went from about 4 percent in 1995 to 12 percent in 2014.

Today, it’s not uncommon to read of marijuana that’s legally-sold in places like Colorado with THC content above 20 percent, occasionally 30 percent! Legalization advocates minimize the exponential growth in potency by saying that twenty or more years ago, Americans didn’t have access to “the good stuff.”

Well, that misses the point by several astronomical units. The point is that those people who daily use “the good stuff” are five times more likely to find themselves in a hospital suffering from delusions and hallucinations, to name only two symptoms of psychosis.

Now, critics will respond, “That’s correlation, not causation.” And that’s the criticism leveled at journalist Alex Berenson, author of “Tell Your Children: The Truth about Marijuana, Mental Illness and Violence,” a book I recommend highly. But as I heard Berenson say just last week in Denver, of course it’s correlation and not causation. The only way to prove causation would be to ask half a sample group to experiment with something that may harm them. That’s not ethically possible. By the way, all the studies that made us believe that cigarette smoking causes lung cancer were correlated studies too, but that was enough to convince us all.

Even so, writer Ron Powers doesn’t need a peer-reviewed study to convince him of the link between marijuana use and psychosis. In his 2017 book, “Nobody Cares About Crazy People,” he tells the moving story of his two sons, Dean and Kevin, who were both diagnosed with schizophrenia in their late teens.

As Powers tells readers, while there is a strong genetic component to schizophrenia, there is no “schizophrenia gene.” Instead, it’s a constellation of genetic and environmental factors that make people susceptible to schizophrenia. One of these, as Powers painfully learned, is heavy marijuana use, especially in the teenage years.

Of course, some people will tell you that they and most people aren’t mentally ill, so there’s little if any risk. But for a host of reasons, no one can know that with certainty. In fact, all pronouncements about how safe marijuana legalization is simply overstates the case.

That’s exactly what happened here in Colorado. The possible pitfalls were denied or downplayed. And so, Colorado now holds the dubious distinction of leading the country in first-time drug use. And the rate of monthly marijuana use among 18-to-25-year-olds in states with legal weed is nearly three times as much as states that haven’t legalized it.  By the way, 18-25 is the age when schizophrenia often begins to manifest.

And since legalization, Colorado has seen a a spike in marijuana-related emergency room visits by people between the ages of 13 and 20.

Given the well-documented mental health risks, especially to not-fully-formed adolescent brains, the rush to legalization is the height of irresponsibility. An irresponsibility that can shatter lives. And don’t just take our word for it.

But I want to push back against this idea, at least on a couple of fronts. First, it just isn’t true! You can’t convince me that the work of people like Francis Schaeffer, Chuck Colson, David Noebel, or the work of groups like Summit Ministries or the Colson Center, teaching Christians how to approach culture from a Christian worldview hasn’t made a difference. I’ve seen young faces light up when they get this Christianity thing for the first time, realizing it’s true, and that faith relates to culture. I’ve seen too many to believe that it hasn’t made an impact. I was one of those faces in 1994 thanks to Bill Brown and Gary Phillips.

And stats back me up on this. Far from the doom and gloom we often hear in the media, and from Christian sources, the Church isn’t collapsing in America. In fact, evangelicals have one of the highest retention rates of their young people of any Christian group.

And to say that “worldview hasn’t worked” is to ignore the incredible inroads made in the academy in our lifetime. Consider that the entire discipline of philosophy was flipped on its head in the late 20^th century by people like Alvin Plantinga. Consider the amazing progress in law, not only now, but the seeding of jurisprudence by the folks at Alliance Defending Freedom. Consider the gains of the pro-life movement. All of these were either directly or indirectly inspired by Christians taught to engage culture armed with Christian worldview thinking.

What this thinking has done, through ministries like Colson Center and programs like BreakPoint, is offer an antidote to the toxic assumption that Christianity is just something you do on Sunday in the pews; that Christianity is personal and private. No way. Christianity is personal, but it’s not private. Every square inch of human existence belongs to Christ.

Now don’t get me wrong. I’m under no illusion that things are going great in the culture. No, Christians are facing incredible challenges around the world. And in Western culture, it’s all but lost any sort of privileged position it once had.

But here’s the kicker: at the Colson Center, we don’t teach worldview or champion the idea that Christians should “engage culture” because it “works.” It’s not a strategy, folks. We do it because we’re redeemed human beings, and because redemption is in line with, not opposed to, our created purpose.

Christians shouldn’t make art, write literature, compose music, build businesses or any of these things to win a kind of war against secularism. We do these things because they’re part of what it means to be truly human. And that’s what Jesus saved us to be—fully human worshipers of God with all of our lives.

So yes, the worldview movement and its emphasis on culture has made a difference. I know the beneficiaries by name. But we don’t teach worldview or engage culture for strategic purposes. We do it because Christianity isn’t Christianity without it.

As Chuck Colson would often say, Christians are to “make the invisible kingdom visible.” We do just that by intentionally engaging the culture around us in every sphere of life God has called us to. A great way to take a deeper dive into engaging the culture is to become a Colson Fellow. Click here to find out more about applying for the next class in the Colson Fellows Program.