Philosophy is a progressive science , like physics or mathematics. It is not recognized as a progressive science because its progress has been imperceptibly slow. Its progress has been slow mostly because there were just too few deep thinkers to advance it. A man of 400 years ago would be astonished by the sheer numbers of scientists productively working today. It was Bacon who put them to work by observing that knowledge is power, and that nature is our ultimate source of knowledge.
Philosophy is the most powerful knowledge, and reality is our ultimate source of philosophy.