Fifty years is a long time. In the last half-century alone, humanity has been moved from an industrialized collection of countries to a globe-spanning digital civilization. These changes have caused massive upheavals in every aspect of society, including business. And while companies that have lasted for over 50 years are somewhat common, companies that manage to pay and increase dividends for 50 or more consecutive years are not. That takes me to the Dividend Kings, which are some of the best investments for income generation and retirement planning. But like any “best of anything” list, ther…