Complex sentence: In his "The Winner-Take-All Society", Frank discussed the fact that more and more of current economy and other institutions are moving toward a state where very few winners take very much, while the rest are left with little.
Split into simpler sentences: In his "The Winner-Take-All Society", he discusses the contemporary trend toward concentration of wealth. He argues that more and more of the current economy and other institutions are moving toward a state where very few winners take very much, while the rest are left with little.