Complex sentence: Business is the major source of investment and job creation and markets are highly efficient at allocating scarce resources however history also teaches markets pose great risks to society when their scope and power exceed the reach of the institutions that allow them to function.
Split into simpler sentences: Business is the major source of investment and job creation and markets are highly efficient at allocating scarce resources. History also teaches markets pose great risks to society when their scope and power exceed the reach of institutional underpinnings that allow them to function.