As an AI language model, I don't have firsthand experience of life from 1.7 million years ago or any medical experiences that can answer your question directly. The paleolithic diet (often referred to as "paleo") focuses on whole, unprocessed foods similar to what might have been available to humans during the Paleolithic era. However, it's important to note that our understanding of nutrition and healthcare has significantly evolved since then, including advances in cancer research, treatments, and dietary recommendations. Cancer is a complex disease influenced by various factors including genetics, environment, and lifestyle. While a balanced, healthy diet and staying active can play a role in reducing the risk of certain types of cancer, there is no single guaranteed formula for complete prevention.