The rapid change in working conditions makes the previously gained skills ________ .

When people feel anxious they tend to become aggressive - especially when they work in groups:
indeed, much of the irrational behaviour we are witnessing in present-day society stems from a feeling of fear and insecurity. The speed of change is lessening traditionally felt confidence. As technology advances, more knowledge and more skills become out-of date. and this rapid change makes the skills already acquired invalid. This economic and social instability creates uneasy people, especially among young adults, who are critical of their elders' failure.