On Monday, the Nasdaq stock index climbed to 5008.10 points, passing 5000 points for the first time in nearly 15 years. The index has been hit hard during these 15 years by the burst of the dot-com bubble...

The most intriguing aspect of Silicon Valley is also one of its greatest liabilities: It exists in a vacuum. It’s a place where popularity is power and users are profits. All the while, the investments...