Before the era of the specialist scientist, physical reality as a whole was the purview of the natural philosopher. This work is one of natural philosophy. Since the commencement of the twentieth century, science has became inundated with counter intuitive concepts. However, all genuine natural philosophy is based on man’s intuitive realism which evolved for the purpose of enabling homo sapiens to understand physical reality through sensory experience. The genesis of the concepts of genuine intuitive realism is the unconscious in which ongoing and stored sensory experience are analysed and intuitive realistic concepts are transferred to the mind purged of the specialised sciences at variance with physical realism Consequently, it has been my preoccupation for many years, to study with growing disparagement, those many concepts of the specialised sciences which, from the beginning of the twentieth century, run counter to intuitive realism. Examples of concepts countering intuitive realism are; that motion dilates time and contracts lengths; that time and space are not separate but welded together; a particular particle creates mass in particles without mass; that there are a multitude of dimensions which are invisible because they are tightly rolled up; that a body can be at two places at the same time; that what we see is not physical reality but a rendition of that reality in our brain and that a horse shoe can make a blacksmith. It is time that intuition is credited with the praise it deserves and there needs to be a cutting down to size of counter intuitive science. I have examined and revealed flaws in such prevailing counter intuitive realistic theories as special relativity; general relativity; QED; the standard model of micro particles; string theory; cerebral visual rendition, and natural selection. I propose alternative natural philosophic concepts which do not conflict with intuitive realism. I present this work in five chapters, with an epilogue, under the umbrella title of Effective Realism or In Praise of Intuition. Intuitive realism is the bedrock of Effective Realism and this work proclaims its effectiveness.