What forces have given rise to social unrest, or may do so in the future? Have local cultures succumbed to or survived the proliferation of information and possible “McDonaldization?”

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion

The answer is that they depend on rainfall for their crops to grow. hope this .

Tropic of cancer and tropic of capricorn

Answerseasonal dry and wet winds this answer is right outta of the book