𝐇𝐀𝐑𝐕𝐀𝐑𝐃’𝐒 𝐎𝐖𝐍 𝐒𝐓𝐔𝐃𝐘 𝐄𝐗𝐏𝐎𝐒𝐄𝐃 𝐓𝐇𝐄 𝐓𝐑𝐔𝐓𝐇 𝐀𝐁𝐎𝐔𝐓 𝐃𝐈𝐕𝐄𝐑𝐒𝐈𝐓𝐘 — 𝐒𝐎 𝐓𝐇𝐄𝐘 𝐁𝐔𝐑𝐈𝐄𝐃 𝐈𝐓 𝐅𝐎𝐑 𝐅𝐈𝐕𝐄 𝐘𝐄𝐀𝐑𝐒

Robert Putnam is...a 𝐇𝐚𝐫𝐯𝐚𝐫𝐝 𝐩𝐫𝐨𝐟𝐞𝐬𝐬𝐨𝐫, a past president of the 𝐀𝐦𝐞𝐫𝐢𝐜𝐚𝐧 𝐏𝐨𝐥𝐢𝐭𝐢𝐜𝐚𝐥 𝐒𝐜𝐢𝐞𝐧𝐜𝐞 𝐀𝐬𝐬𝐨𝐜𝐢𝐚𝐭𝐢𝐨𝐧, a recipient of the 𝐍𝐚𝐭𝐢𝐨𝐧𝐚𝐥 𝐇𝐮𝐦𝐚𝐧𝐢𝐭𝐢𝐞𝐬 𝐌𝐞𝐝𝐚𝐥 — awarded to him personally by 𝐁𝐚𝐫𝐚𝐜𝐤 𝐎𝐛𝐚𝐦𝐚 𝐢𝐧 𝟐𝟎𝟏𝟑 — and the author of 𝘉𝘰𝘸𝘭𝘪𝘯𝘨 𝘈𝘭𝘰𝘯𝘦, one of the most cited books in modern political science.  - M.A. Rothman

And in 2001, he completed the 𝐥𝐚𝐫𝐠𝐞𝐬𝐭 𝐬𝐭𝐮𝐝𝐲 𝐞𝐯𝐞𝐫 𝐜𝐨𝐧𝐝𝐮𝐜𝐭𝐞𝐝 𝐨𝐧 𝐜𝐢𝐯𝐢𝐜 𝐞𝐧𝐠𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐢𝐧 𝐀𝐦𝐞𝐫𝐢𝐜𝐚 — nearly 𝟑𝟎,𝟎𝟎𝟎 𝐢𝐧𝐭𝐞𝐫𝐯𝐢𝐞𝐰𝐬 across 𝟒𝟏 𝐜𝐨𝐦𝐦𝐮𝐧𝐢𝐭𝐢𝐞𝐬 nationwide — and the results destroyed the central premise of the diversity industry.
What did he find? 

• In the most diverse communities, 𝐧𝐞𝐢𝐠𝐡𝐛𝐨𝐫𝐬 𝐭𝐫𝐮𝐬𝐭 𝐨𝐧𝐞 𝐚𝐧𝐨𝐭𝐡𝐞𝐫 𝐚𝐛𝐨𝐮𝐭 𝐡𝐚𝐥𝐟 𝐚𝐬 𝐦𝐮𝐜𝐡 as they do in homogeneous settings. 
• The greater the diversity, the 𝐟𝐞𝐰𝐞𝐫 𝐩𝐞𝐨𝐩𝐥𝐞 𝐯𝐨𝐭𝐞. 
• The less they 𝐯𝐨𝐥𝐮𝐧𝐭𝐞𝐞𝐫. 
• The less they 𝐠𝐢𝐯𝐞 𝐭𝐨 𝐜𝐡𝐚𝐫𝐢𝐭𝐲 and work on community projects. 
• 𝐕𝐢𝐫𝐭𝐮𝐚𝐥𝐥𝐲 𝐚𝐥𝐥 𝐦𝐞𝐚𝐬𝐮𝐫𝐞𝐬 𝐨𝐟 𝐜𝐢𝐯𝐢𝐜 𝐡𝐞𝐚𝐥𝐭𝐡 — trust, cooperation, friendship, community engagement — were 𝐥𝐨𝐰𝐞𝐫 in more diverse settings (Putnam, 𝘚𝘤𝘢𝘯𝘥𝘪𝘯𝘢𝘷𝘪𝘢𝘯 𝘗𝘰𝘭𝘪𝘵𝘪𝘤𝘢𝘭 𝘚𝘵𝘶𝘥𝘪𝘦𝘴, 2007)....

So what did Putnam do with these findings? 

He 𝐬𝐚𝐭 𝐨𝐧 𝐭𝐡𝐞𝐦 𝐟𝐨𝐫 𝐟𝐢𝐯𝐞 𝐲𝐞𝐚𝐫𝐬...