What is the topic sentence?
1. money does not buy happiness or security. 2. john ringling, one of the five brothers of the ringling brothers circus, started out in 1884 with a trained horse and a performing bear. 3. for over forty years, he worked hard at the family enterprise, bought up smaller circuses, and imported new acts. 4. in the 1920s, he was rated as one of the world's wealthiest men and owned every sizable circus in the country. 5. over 5,000 people were on his payroll, and over 240 railroad cars were in his retinue each time the circus moved. 6. at the time of his death, however, he was a nervous, unhappy man; he was also bankrupt and beset by lawsuits. 7. his carefully built circus empire passed into alien hands. 8. all those years of work had turned to dust.