In BBC's program "Richard Hammond's Engineering Connections" [link] on the Airbus A380 [link 1] [link 2] [link 3], he says that a composite made of fibreglass and aluminium [GLARE] was stronger than either of these two materials alone [even when each material alone is used with the same thickness as that of GLARE]. Also, these two materials served different purposes within the composite [thus providing the composite with both sets of benefits, albeit with only half the magnitude each]. For example, cement takes the compression while steel taken the tension. Better together when facing the same situation, simultaneously. Makes me feel like this is the way in companies, where different employees are given different job roles [finance, marketing, operations, etc.]. Neither is sufficient by himself, but together they're stronger than either by himself. Each "material" in a company serves a specific purpose when facing the same overall situation.