Complex sentence: Whether it be through Wal-Mart's colossal status or Starbucks' aggressive invasion of a region, Klein argues that the goal of each company is to become the dominant force in its respective field.
Split into simpler sentences: Whether it be through Wal-Mart's colossal status or Starbucks' aggressive invasion of a region, the goal is the same. Each of the major brands wishes to become the dominant force in its respective field.