Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE perpetrator ( Perpetrator_ID int, People_ID int, Date text, Year real, Location text, Country text, Killed int, Injured int )
TABLE: CREATE TABLE people ( People_ID int, Name text, Height real, Weight real, "Home Town" text )

### Question ###
Return a bar chart on what are the countries of perpetrators? Show each country and the corresponding number of perpetrators there, and list in descending by the y axis please.

### Accurate SQL ###

SELECT Country, COUNT(*) FROM perpetrator GROUP BY Country ORDER BY COUNT(*) DESC