For every person in the world, there is an equivalent, physical, opposite of them. What are the consequences?

For every person in the world, there exists an equivalent, physical, opposite of them. This opposite is referred to as their 'antipode'. Each person on the planet has a exact, physical antipode, living somewhere in the world, who is their exact, physical opposite, in every detail that counts. <br><br>Everyone's antipode is in exactly the corresponding opposite position on the globe (e.g. if you live in the northern hemisphere, they live in the southern hemisphere, and vice versa). <br><br>Every person's antipode is their exact physical opposite, in every detail. If you're a man, your antipode is a woman, and vice versa. If you're white, your antipode is black, and vice versa. <br><br>This is the case for every person in the world, with no exceptions. <br><br>What are the consequences of this? How would society, and science, be affected by universal antipodes?<br><br>The antipodes are natural opposites, but not natural enemies. <br><br>[Inspired by the 'antipodes' in the movie Enter the Void, as well as the 'dark doppelganger' in The Shadow. Inspired by the 'antipodes' from various other media, as well as the 'doppelgangers' and 'dark doubles' from various other media. Inspired by the 'shadow people' and the 'dark doppelganger' from various cultures and traditions.]