Trudeau and his team should read Chapter IX of  'Democratic Government and Politics' by J.A. Corry and J.E. Hodgetts..  Among the undesirable tendencies of proportional representation the authors mention a proliferation of political parties: 'To establish the tendency of proportional representation towards a multiplication of parties, one could rely on the actual results in the countries of continental Europe that used proportional rpresentation.  For example, in Germany before the adoption of the list system in 1919, there were only half a dozen significant political parties.  When Hitler abolished all parties in 1933, there were twice that number of significant parties as well as a number of sects endeavouring to assert themselves as political parties. ' (...) The inevitable result of a multiple-party system is weak government....

Our Justin should realize that Adolf Hitler became Chancelor of Germany under a proportional representation system of voting.