Source: Rawpixel/Unsplash Like many lately, my friend Alice’s son is addicted to Fortnite, the video game of the moment. Unsure of what to do, Alice offered her 12-year-old several hundred dollars to abandon Fortnite for a month. He refused without hesitation. So a few weeks later, when I asked a young man in his 20s to explain the sensation to me, he instantly likened Fortnite to “crack.” For many parents, who might already have to nag their children to put down…