In a joint initiative, African countries are renewing their efforts to obtain reparations from European countries for the transatlantic slave trade and other colonial-era wrongs committed centuries ago. The slave trade — which affected millions of Africans — was the largest forced migration in history and one of the most inhumane. Over 400 years, Africans were transported to many areas of the world, yet no reparations have as yet been paid. The process is proving much slower than many Africans expected. This week Ghana's president, Nana Akufo-Addo, revived the push for slavery and colonial retribution. "No amount of money can...