The birth rate of unicorns—firms with a valuation north of $1bn—has plummeted, and prior investors in them are eyeing what exits exist. We ask why the species is endangered. The struggle to finance and build homes is contributing to a profound housing crisis in sub-Saharan Africa (08:34). And the return of Parler, a darling social-media platform for America’s far right (17:56).Get a world of insights for 50% off—subscribe to Economist Podcasts+If you’re already a subscriber to The Economist, you’ll have full access to all our shows as part of your subscription. For more information about how to access Economist Podcasts+, please visit our FAQs page or watch our video explaining how to link your account. Hosted on Acast. See acast.com/privacy for more information.