Maps are fundamental to the science of

T̥ͦh̥ͦe̥ͦ ḁͦn̥ͦs̥ͦw̥ͦe̥ͦr̥ͦ i̥ͦs̥ͦ:

C̥ͦḁͦr̥ͦt̥ͦo̥ͦg̥ͦr̥ͦḁͦp̥ͦh̥ͦy̥ͦ

H̥ͦo̥ͦp̥ͦe̥ͦ i̥ͦ c̥ͦo̥ͦu̥ͦl̥ͦd̥ͦ h̥ͦe̥ͦl̥ͦp̥ͦ y̥ͦo̥ͦu̥ͦ

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.

it was douglas macarthur..