After laying in a hospital bed being given a fifty fifty chance of surviving double pneumonia, Robertus reflected upon his life and achievements. Upon surviving, and the following three weeks in intensive care, Robertus wanted to give to his children all that he had learned and discovered through his martial art training which spanned, at this point in time over 15 years. It was this beginning of the writing and recording that formed the path that led him to eventually create his current books. Upon getting his health back and the years that followed, Robertus intensively trained, taught, researched and recorded every little detail. He analysed everything to do with self defense before eventually condensing most of this information within his first book 'I am Man'. It was this path that led him back in time to the use of ancient warfare tactics, where he believed all the secrets to human survival laid. It became a beginning of a new journey into the worlds of our ancient ancestors.