Complex sentence: The Capability Approach (aka Capabilities Approach) began life in the 1980s as an approach to welfare economics in which Amartya Sen tried to bring together a range of ideas that were hitherto excluded from, or inadequately formulated in, traditional approaches to the economics of welfare.
Split into simpler sentences: The Capability Approach (aka Capabilities Approach) began life in the 1980s as an approach to welfare economics. In this approach, Amartya Sen brought together a range of ideas that were hitherto excluded from (or inadequately formulated in) traditional approaches to the economics of welfare.