The ratio of guns per person in the countries; weird numbers

I was reading a book that mentioned the ratio of guns per capita in the U.S. It was interesting & I googled to figure out that ratio in the other countries. We suppose that after the U.S. we find the countries that have political issues or civil war the table, for example Yemen or Syria or Colombia. However, the result was confusing for me.  From the countries with long time civil war, there was only Yemen among the top 10 countries. Lebanon is the 11st right after Finland. Canada is the 7th, but after almost 8 years civil war Syria is the rank 99th and burning Ukraine is 88th. Italy (52nd) is above Libya (59th). How is it possible? How people in the developed countries can have more guns than people in the poor countries and still their countries are safer? Crime rate in Canada is less than Afghanistan (42 to 76 per 100,000 people) although Canada has nearly 3 times guns to Afghanistan. How is the law, the law force and the juristic system in their countries that they can keep low the crime rate despite on too many guns keeping at their houses? It is the big mystery for me.