Remaking the Wealth of the Nations - MD Chowdhury

This book has found out the reasons as to why the \wealth of nations\ differ from each other? Why the GDP per capita of Canada, and the U.S. were $43,248.5 and $56,115.7 respectively in 2015, whereas Mexico was languishing at $9,005, despite sharing common borders? Why is the per capita of Malawi not identical to Luxembourg or USA? Why the mountains of macro and micro economic studies failed to grow the economy up to expectation? Have the theories of capitalism and communism dissipated into thin..