As usual we are suppose to carry the burden of your ignorance.
Japan had a well entrenched caste system. Have you heard of a caste called 'samurai' ? other Japanese caste's were furiuri, tanagari, mizunomi-byakusho. They even had a class of untouchables called Burakumin.
Europe had a well defined caste system divided as the clergy, Nobility and Peasants. In fact the Peasants themselves had sub caste as slave, serf and freeman. France and Spain even had a class of untouchables called Cagots who had zero upward social mobility and had to use segregated doors, drink from segregated fonts, and even christianity treated them as untouchables by refusing them equal rights as other christians.
Most societies in Africa had caste system with various jati's considering themselves as superior. The Tutsi consider themselves superior to the Hutu. In fact these caste difference even today cause civil wars in African nations.
Yemen had a caste system with a lower caste called Al-Akhdam who were perpetual laborers.
All countries from Sri Lanka, Nepal, Pakistan, Indonesia, Thailand, cambodia etc.. had caste which is very similar to Indian caste system.
The only difference is that these nations have stopped practicing it while our constitutions forces us to practice the caste system.
As to your last piece of stupidity, there is no perfect equality or equal opportunity anywhere in the world, that is why people rely on meritocracy the world over. Mukesh Ambani's son will always have more opportunities than me, so will Rahul Gandhi.
If you had got yourself educated via a meritorious system you would have know these things yourself without me having to explain them to you.
