This document summarizes the emerging challenges facing human resource management in the 21st century. It discusses three main challenges: 1) effective recruitment and selection is challenging due to globalization and potential for bias, 2) providing career development and growth opportunities to retain top talent as technologies and industries rapidly change, and 3) promoting an organizational culture and managing a heterogeneous workforce with diverse cultures, values, and backgrounds. The document analyzes each challenge and its implications for human resource managers.