This is a draft review manuscript by our PhD student under the EJP Soils C-arouNd project funded by the New Zealand Government at the Kwame Nkrumah University of Science and Technology, Ghana. The manuscript is titled "Regional drivers of soil organic carbon stocks in sub-Saharan Africa". It will undergo moderate fine-tuning prior to submission to the journal. It is now required to be captured as a deliverable in our progress report to NZAGRC. We are very sorry for the short notice.