While the whole world is going through the heavy, painful, and dark transition into global socialism, it might be a good thing for your nerves to see a film that's simple and full of sunlight. Such a film is The Grocer's Son. It's about a young man who leaves his poverty in Paris only to rediscover the joys of primitive (or pastoral) capitalism. From a grocery van, he sells toothpaste, peas, and sticks of salami to old country people who may or may not pay. Ahhh, life can be so easy. (Harvard Exit, 807 E Roy St, 781-5755. 4:45, 7:15, and 9:30 pm; $9.50.)