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 people ( People_ID int, Name text, Country text, Is_Male text, Age int )
TABLE: CREATE TABLE church ( Church_ID int, Name text, Organized_by text, Open_Date int, Continuation_of text )
TABLE: CREATE TABLE wedding ( Church_ID int, Male_ID int, Female_ID int, Year int )

### Question ###
A bar chart about the number of countries for all people whose age is smaller than the average, and display by the total number in descending.

### Accurate SQL ###

SELECT Country, COUNT(Country) FROM people WHERE Age < (SELECT AVG(Age) FROM people) GROUP BY Country ORDER BY COUNT(Country) DESC