Human evolution, modernity and globalization

I guess the idea or rather questions that that have been consistently present in my thoughts after this weeks readings are about human evolution. The idea/questions derive specifically from the fifth chapter, when Darwin states that variations occur due to environmental factors. So in the age of globalization and never ending changes in modernization (technologically, medically, etc.) how is human evolution affected? Humans are constantly moving from one place to another, encountering different geographical locations and facing different technological advances; are these changes allowing for the human body to adapt? Is this constant movement allowing the human species to evolve according to the environmental factors that affect it, or is it limiting the species' ability to evolve? Is it even evolving? Or is the human species evolving to a point where it can adapt to all of the changes both in the age of globalization, as well as modernity and technology?