The first thing to acknowledge about diversity is that it can be difficult. In the U.S.， is relatively1 advanced， even the mention of the word "diversity" can lead to anxiety and conflict. Supreme2 disagree on the virtues3 of diversity and the means for achieving it. Corporations spend billions of dollars to attract and manage diversity both internally and externally， yet they still face discrimination lawsuits4， world remain predominantly white and male. Diversity of expertise5 -- you would not think of building a new car without engineers， designers and quality-control experts -- but what about social diversity? from diversity of race， ethnicity， gender6 and sexual orientation7? 8， rougher interactions，， greater perceived interpersonal conflict，， less cohesion9， more concern about disrespect， and other problems. So what is the upside? capable of innovating10， you ne and perspectives， leading to bett and lead to unfettered discoveries and breakthrough innovations. Ev scientists， psychologists， sociologists， economists11 and demographers12.