By all accounts, Prime Minister Narendra Modi’s third trip to South Africa was a success. The local Indian community treated him like a rock star. He was riding high, and not just because of the Chandrayaan-3 triumph. India’s economy is booming while China faces demographic collapse and Russia faces recession. For Modi, the visit to South Africa was about more than just BRICS. He has long understood Africa’s growing importance to the world economy. In his decade as prime minister, he has made two previous trips to the continent: In 2016, he visited South Africa, Mozambique, Tanzania, and Kenya, each…