Final answer:
The information provided does not align with the question asked about the Ventures and the Playboys; therefore, an accurate answer cannot be provided based on the mismatched historical context. Instead, a brief analysis of gender roles in 'Riders of the Purple Sage' was discussed.
Step-by-step explanation:
The question regarding the Ventures and the Playboys appears to be a mix-up as these terms are not directly related to the provided historical context of the American industrialists such as Vanderbilt, Carnegie, Rockefeller, and Morgan. Therefore, it's not possible to provide an accurate answer based on the reference given in the question prompt about the 'Giants of Wealth'.
Instead, the roles of men and women in Riders of the Purple Sage reveal traditional gender norms of the time period, showing women as caretakers and objects of protection, while men are portrayed as the protectors and doers. The characters' adherence to or rebellion against these roles greatly influences the course of the novel, highlighting themes such as independence, justice, and the struggle between good and evil.